Merriam-Webster's Word of the Day for November 3, 2025 is:

fidelity • \fuh-DELL-uh-tee\  • noun

Fidelity is the quality or state of being faithful to a person, such as a partner or spouse, or a thing, such as one's country. Fidelity can also refer to accuracy or exactness in details, or the degree to which an electronic device (such as a television) accurately reproduces its effect (such as sound or picture).

// After almost three decades on the job, no one can doubt their fidelity to the company.

// The movie's director insisted on total fidelity to the book.

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Examples:

“The origins of the role [of ring bearer] actually have their roots in ancient Egypt, where a young boy would be enlisted to carry rings to a couple as a symbol of love, fidelity, and fertility.” — Shelby Wax, Vogue, 10 July 2025

Did you know?

Fidelity came to English by way of Middle French in the 15th century, and can ultimately be traced back to the Latin adjective fidēlis, meaning “faithful, loyal, trustworthy.” While fidelity was originally exclusively about loyalty, it has for centuries also been used to refer to accuracy, as in “questions about the fidelity of the translation.” Nowadays fidelity is often used in reference to recording and broadcast devices, conveying the idea that a broadcast or recording is “faithful” to the live sound or picture that it reproduces.

Merriam-Webster's Word of the Day for November 2, 2025 is:

arbitrary • \AHR-buh-trair-ee\  • adjective

Arbitrary describes something that is not planned or chosen for a particular reason, is not based on reason or evidence, or is done without concern for what is fair or right.

// Because the committee wasn't transparent about the selection process, the results of the process appeared to be wholly arbitrary.

// An arbitrary number will be assigned to each participant.

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Examples:

“The authority of the crown, contemporaries believed, was instituted by God to rule the kingdom and its people. England's sovereign was required to be both a warrior and a judge, to protect the realm from external attack and internal anarchy. To depose the king, therefore, was to risk everything—worldly security and immortal soul—by challenging the order of God's creation. Such devastatingly radical action could never be justified unless kingship became tyranny: rule by arbitrary will rather than law, threatening the interests of kingdom and people instead of defending them.” — Helen Castor, The Eagle and the Hart: The Tragedy of Richard II and Henry IV, 2024

Did you know?

Donning black robes and a powdered wig to learn about arbitrary might seem to be an arbitrary—that is, random or capricious—choice, but it would in fact jibe with the word's etymology. Arbitrary comes from the Latin noun arbiter, which means “judge” and is the source of the English word arbiter, also meaning “judge.” In English, arbitrary first meant “depending upon choice or discretion” and was specifically used to indicate the sort of decision (as for punishment) left up to the expert determination of a judge rather than defined by law. Today, it can also be used for anything determined by or as if by chance or whim.

Merriam-Webster's Word of the Day for November 1, 2025 is:

ostracize • \AH-struh-syze\  • verb

To ostracize someone is to exclude them from a group by the agreement of the group's members.

// She was ostracized by her community after refusing to sign the petition.

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Examples:

"Telling stories with affection and noodging, [comedian Sarah] Silverman has always been encouraged by her family, who embraced rather than ostracized her for revealing family secrets on the way to reaping howls of laughter." — Thelma Adams, The Boston Globe, 19 May 2025

Did you know?

In ancient Greece, citizens whose power or influence threatened the stability of the state could be exiled by a practice involving voters writing that person's name down on a potsherd—a fragment of earthenware or pottery. Those receiving enough votes would then be subject to temporary exile from the state. Ostracize comes from the Greek verb ostrakízein (itself from the noun óstrakon meaning "potsherd"), used in 5th century Athens for the action of banishing someone by way of such a vote. Someone ostracized today is not exiled, but instead is excluded from a group by the agreement of the group's members.

Merriam-Webster's Word of the Day for October 31, 2025 is:

hobgoblin • \HAHB-gahb-lin\  • noun

A hobgoblin is a mischievous goblin that plays tricks in children's stories. When used figuratively, hobgoblin refers to something that causes fear or worry.

// This Halloween we were greeted at our door by werewolves, mummies, and a wide assortment of sweet-toothed hobgoblins.

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Examples:

“Vampires and zombies took a big bite out of the horror box office in Sinners and 28 Years Later, and with Del Toro's Frankenstein hitting theaters next week, it would seem that a return to classic marquee monsters is one of the stories of this summer's movie season. But there's one old-school hobgoblin that's lurking around the edges of this narrative, omnipresent, repeated across a number of notable new titles, but still somehow avoiding the limelight: the witch ...” — Payton McCarty-Simas, The Hollywood Reporter, 25 Aug. 2025

Did you know?

While a goblin is traditionally regarded in folklore as a grotesque, evil, and malicious creature, a hobgoblin tends to be more of a playful troublemaker. (The character of Puck from Shakespeare's A Midsummer Night's Dream might be regarded as one.) First appearing in English in the early 1500s, hobgoblin combined goblin (ultimately from the Greek word for “rogue,” kobalos) with hob, a word from Hobbe (a nickname for Robert) that was used both for clownish louts and rustics and in fairy tales for a mischievous sprite or elf. The American writer Ralph Waldo Emerson famously applied the word's extended sense in his essay Self-Reliance: “A foolish consistency is the hobgoblin of little minds, adored by little statesmen and philosophers and divines.”

Merriam-Webster's Word of the Day for October 30, 2025 is:

truculent • \TRUCK-yuh-lunt\  • adjective

Truculent describes a person who is easily annoyed and eager to argue or fight. It can also describe the mood or attitude of such a person.

// The approach of multiple deadlines had put me in a truculent mood, and I could tell my colleagues were avoiding me.

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Examples:

“It's the holidays, and strings of gaudy rainbow lights twinkle from gables. In cozy living rooms, the elders doze in their chairs while middle-aged siblings bicker and booze it up around the dining table. Little kids squirm in makeshift beds trying to stay awake for Santa, while truculent teenagers sneak out into the suburban night to do secret teenager things.” — Jessica Kiang, Variety, 24 May 2024

Did you know?

English speakers adopted truculent from Latin in the mid-16th century, trimming truculentus, a form of the Latin adjective trux, meaning “savage,” and keeping the word's meaning. Apparently in need of a new way to describe what is cruel and fierce, they applied truculent both to brutal things (wars, for example) and people (such as tyrants). Eventually even a plague could be truculent. In current use, though, the word has lost much of its etymological fierceness. It now typically describes the sort of person who is easily annoyed and eager to argue, or language that is notably harsh.

Merriam-Webster's Word of the Day for October 29, 2025 is:

deliquesce • \del-ih-KWESS\  • verb

Deliquesce can mean "to dissolve or melt away" or, in reference to some fungal structures (such as mushroom gills), "to become soft or liquid with age or maturity."

// The mushrooms deliquesced into an inky fluid.

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Examples:

"He would mould his figures in full in wax, then take a hot knife and—like a metaphysical surgeon—cut away triangles, rhomboids, flaps and scraps, until only a latticework was left. These new shapeshifting figures comprised more gaps than joins: bodies in the delicate, arduous process of shedding their skins, scattering into metal petals, being eroded and deliquesced. Things were freshly able to pass through these painstakingly hard-to-cast bronzes: light, air, sight." — Robert Macfarlane, Apollo, 1 May 2025

Did you know?

Deliquesce comes from the prefix de- ("from, down, away") and a form of the Latin verb liquēre, meaning "to be fluid." Things that deliquesce, it could be said, turn to mush in more ways than one. In scientific contexts, a substance that deliquesces absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution. When plants and fungi deliquesce, they lose rigidity as they age. When deliquesce is used in non-scientific contexts, it is often in a figurative or humorous way to suggest the act of "melting away" under exhaustion, heat, or idleness, as in "teenagers deliquescing in 90-degree temperatures."

Merriam-Webster's Word of the Day for October 28, 2025 is:

menagerie • \muh-NAJ-uh-ree\  • noun

Menagerie refers to a collection of animals kept especially to be shown to the public, as well as a place where such animals are kept. It can also refer figuratively to any varied mixture of things.

// The aviary featured a menagerie of exotic birds.

// The space is eclectically furnished with a menagerie of flea market finds.

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Examples:

“The creatures are usually found hanging from phones or handbags ... or clutched as a kind of pet. They come in a menagerie of more than three hundred collectible forms. They can be matched to a personal style or mood: pink fur for when you're feeling flirty; glowing red eyes for a bit of an edge ...” — Kyle Chayka, The New Yorker, 20 Aug. 2025

Did you know?

Back in the days of Middle French, ménagerie meant “the management of a household or farm” or “a place where animals are tended.” When English speakers adopted menagerie in the 1600s, they applied it specifically to places where wild and often also foreign animals were kept and trained for exhibition, as well as to the animals so kept. This second meaning was eventually generalized to refer to any varied mixture, especially one that includes things that are strange or foreign to one's experience.

Merriam-Webster's Word of the Day for October 27, 2025 is:

acerbic • \uh-SER-bik\  • adjective

Something described as acerbic is sharply or bitingly critical, sarcastic, or ironic in temper, mood, or tone.

// The comedian draws crowds that appreciate his acerbic wit.

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Examples:

"Whether she's giving a sarcastic eye-roll, tossing off an acerbic zinger, or seducing with a come-hither stare, [actress Jennifer] Simard intimately understands the art of underplaying." — Christopher Wallenberg, The Boston Globe, 1 June 2025

Did you know?

English speakers created acerbic in the 19th century by combining the adjective acerb with the suffix -ic-. Acerb had already been around for a couple centuries, but for most of that time it had been used only to describe foods with a sour taste. (Acerb is still around today, but now it's simply a less common synonym of acerbic.) Acerbic and acerb ultimately come from the Latin adjective acerbus, which can mean "harsh" or "unpleasant." Another English word that comes from acerbus is exacerbate, which means "to make more violent or severe."

Merriam-Webster's Word of the Day for October 26, 2025 is:

cognoscente • \kahn-yuh-SHEN-tee\  • noun

Cognoscente refers to a person with expert knowledge in a subject. It is usually encountered in its plural form, cognoscenti, and preceded by the.

// The audience at the club, though small, was full of writers, musicians, and other noteworthy members of the jazz cognoscenti.

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Examples:

"Even as [Ray] Bradbury was embraced by the New York cognoscenti—traveling to the city in the fall of '46, drawing the attention of Truman Capote, meeting Gore Vidal, dancing with Carson McCullers at a Manhattan party—Mars beckoned. Yet he would not dare tell his New York associates, for fear of being laughed out of the room." — Sam Weller, LitHub.com, 28 Apr. 2025

Did you know?

Cognoscente and connoisseur—both terms for those in the know—are more than synonyms; they're also linguistic cousins. Both terms descend from the Latin verb cognōscere, meaning "to know," and they're not alone. You might guess that cognizance and cognition are members of the cognōscere clan. Do you also recognize a family resemblance in recognize? Can you see through the disguise of incognito? Did you have a premonition that we would mention precognition? Cognoscente itself came to English by way of Italian and has been a part of the language since the late 1700s.

Merriam-Webster's Word of the Day for October 25, 2025 is:

wreak • \REEK\  • verb

Wreak means “to cause something very harmful or damaging.” It is often used with on or upon.

// The virus wreaked havoc on my laptop.

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Examples:

“Ours is a geography of cataclysm: Santa Anas wreak their psychic wrath; the odor of disaster seeps from the street like that sulfurous egg smell of the La Brea Tar Pits.” — John Lopez, The Hollywood Reporter, 6 Sept. 2025

Did you know?

In its early days, wreak was synonymous with avenge, a meaning exemplified when Shakespeare's Titus Andronicus proclaims “We will solicit heaven, and move the gods / To send down Justice for to wreak our wrongs.” This sense is now archaic, but the association hasn't been lost: although wreak is today most often paired with havoc, it is also still sometimes paired with words like vengeance and destruction. We humbly suggest you avoid wreaking any of that, however, no matter how badly you may crave your just deserts.