Merriam-Webster's Word of the Day

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. See the entry > 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. See the entry > 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. See the entry > 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.

Merriam-Webster's Word of the Day for October 24, 2025 is: rancid • \RAN-sid\  • adjective Rancid usually describes something edible that has a strong and unpleasant smell or taste because it is no longer fresh. In figurative use, rancid describes things that are very distasteful or offensive. // The corpse flower, which is the largest known individual flower of any plant species, stays open five to seven days and emits a rancid odor. See the entry > Examples: "A great oil should smell green, fresh, alive. Give it a sniff before pouring: Even once-vibrant olive oils can start to lose their aroma after a while. If the oil smells bland, it's best for sautéing, roasting or baking rather than finishing. If it smells rancid (or waxy), toss it." — Andy Baraghani, The New York Times, 27 Aug. 2025 Did you know? Rancid and putrid and fetid—oh my! All three words are used to describe unpleasant smells and tastes, and each traces its roots to a "stinky" Latin word: rancid can be traced back to rancēre; the root of putrid shares an ancestor with putēre; and fetid comes from foetēre—all verbs meaning "to stink." Not long after entering the language in the early 17th century, rancid also developed a second, figurative sense which is used for non-gustatory and non-olfactory offenses, as in "rancid hypocrisy."

Merriam-Webster's Word of the Day for October 23, 2025 is: litany • \LIT-uh-nee\  • noun Litany usually refers to a long list of complaints, problems, etc. It can also refer to a sizable series or set, a lengthy recitation, a repetitive chant, or a particular kind of call-and-response prayer. // Among the television critic’s litany of complaints about the new series is the anachronistic costume design. See the entry > Examples: “Out spilled the litany of all the names of all the things you thought I still feared: A big, bad wolf, a two-headed snake, a balding hyena, a beast dropped from the sky, an earthquake, a devil with red bells around its neck. Your words were steady, steeped in the old stories, but my eyes flicked to the window, unafraid. I was too old for easy monsters.” — Raaza Jamshed, What Kept You?: Fiction, 2025 Did you know? How do we love the word litany? Let us count the ways. We love its original 13th century meaning, still in use today, referring to a call-and-response prayer in which a series of lines are spoken alternately by a leader and a congregation. We love how litany has developed in the intervening centuries three figurative senses, and we love each of these as well: first, a sense meaning “repetitive chant”; next, the “lengthy recitation” sense owing to the repetitious—and sometimes interminable—nature of the original litany; and finally, an even broader sense referring to any sizeable series or set. Though litanies of this third sort tend to be unpleasant, we choose today to think of the loveliness found in the idea of “a litany of sonnets by Elizabeth Barrett Browning.”

Merriam-Webster's Word of the Day for October 22, 2025 is: frolic • \FRAH-lik\  • verb To frolic is to play and move about happily. // We watched the seals as they frolicked in the harbor. See the entry > Examples: “Harper’s consciousness ends up in the body of her mom, Anna. Lily bodyswaps with her soon-to-be grandma Tess. And vice versa. Meaning Lohan and Curtis are playing teens again. While their younger co-stars mug sternly, make jokes about regaining a metabolism ‘the speed of light,’ and frolic on electric scooters, Freaky Friday’s dynamic duo fling themselves into silly sequences ...” — Kristy Puchko, Mashable, 5 Aug. 2025 Did you know? Frolic is a word rooted in pleasure. Its most common function today is as a verb meaning “to play and move about happily,” as in “children frolicking in the waves,” but it joined the language in the 16th century as an adjective carrying the meaning of its Dutch source vroolijk: “full of fun; merry.” Shakespeare’s Puck used it this way in A Midsummer Night’s Dream, saying “And we fairies … following darkness like a dream, now are frolic.” Verb use quickly followed, and by the early 17th century the word was also being used as a noun, as in “an evening of fun and frolic.”

Merriam-Webster's Word of the Day for October 21, 2025 is: sedentary • \SED-un-tair-ee\  • adjective Something described as sedentary does or involves a lot of sitting. Sedentary can also mean "not physically active" (as in "a sedentary lifestyle") or "not migratory" (as in "sedentary birds" or "a sedentary civilization"). // Editing the dictionary is a sedentary job. See the entry > Examples: "From open offices to home workstations, employees across industries invested in sit-stand setups with the hope of counteracting sedentary lifestyles." — Michelle Stansbury, Forbes, 25 Aug. 2025 Did you know? Sedentary comes from the Latin verb sedēre, meaning "to sit." Other descendants of sedēre include dissident, insidious, preside, reside, and subsidy. Sedēre is also the base of the rare sedens, a noun that refers to a person who remains a resident of the place or region of their birth.

Merriam-Webster's Word of the Day for October 20, 2025 is: etymology • \eh-tuh-MAH-luh-jee\  • noun An etymology is an explanation of a word’s history—that is, where the word came from and how it developed. // As a word nerd, I’m always eager to learn a word’s etymology and trace it back to its earliest known origins. See the entry > Examples: “A recent Vogue bride, Nicole Amarise, changed her name—as did her husband. ‘Together we opted to create a new one for our new life together,’ she says. ‘We gave ChatGPT information about the etymology of our old surnames, and guided it to generate surname options for us that could relate to our heritages and cultures.’” — Shelby Wax, Vogue, 16 Aug. 2025 Did you know? The etymology of etymology itself is relatively straightforward, so we won’t bug you with a lengthy explanation. Etymology ultimately comes from the Greek word etymon, meaning “literal meaning of a word according to its origin.” Etymon in turn comes from etymos, which means “true.” Be careful not to confuse etymology with the similar sounding entomology. Entomon means “insect” in Greek, and entomology is a branch of zoology that deals with insects.

Merriam-Webster's Word of the Day for October 19, 2025 is: veritable • \VAIR-uh-tuh-bul\  • adjective Veritable is a formal adjective that means “being in fact the thing named and not false, unreal, or imaginary.” It is often used to stress the aptness of a metaphorical description. // The island is a veritable paradise. // The sale attracted a veritable mob of people. See the entry > Examples: “The Roma are often described as an ethnic minority, but many Romani communities view ‘Roma’ as a broad racial identity, stretching all the way back to our Indian ancestry. Indeed, to look at the Roma as one ethnicity is to disregard the veritable mosaic of Romani subgroups. There’s a thread that holds us all together, which to me feels like a string of fairy lights scattered across the world. Each of these lights shines with its own unique beauty.” — Madeline Potter, The Roma: A Traveling History, 2025 Did you know? Veritable, like its close relative verity (“truth”), came to English through Anglo-French from Latin, ultimately the adjective vērus, meaning “true,” which also gave English verify, aver, and verdict. Veritable is often used as a synonym of genuine or authentic (“a veritable masterpiece”), but it is also frequently used to stress the aptness of a metaphor, often with a humorous tone (“a veritable swarm of lawyers”). In the past, language commentators objected to the latter use, but today it doesn’t draw much criticism.

Merriam-Webster's Word of the Day for October 18, 2025 is: muse • \MYOOZ\  • verb When muse is used to mean "to think about something carefully or thoroughly," it is usually followed by about, on, over, or upon. The word can also mean "to become absorbed in thought," or "to think or say something in a thoughtful way." // He mused on the possibility of pursuing a master's degree. // "I could sell the house," she mused aloud, "but then where would I go?" See the entry > Examples: "On a crisp winter's day, 100-year-old Peg Logan sits in her favorite wingback chair in the living room of her Harpswell home. She flips through the pages of an oversized gardening book and muses about the vegetables she'll plant in the spring." — Connie Sage Conner, The Harpswell (Maine) Anchor, 27 Feb. 2025 Did you know? Muse on this: the word muse comes from the Anglo-French verb muser, meaning "to gape, to idle, to muse." The image evoked is one of a thinker so absorbed in thought as to be unconsciously open-mouthed. Those who muse on their pets' musings might like to know that muser is ultimately from the Medieval Latin noun musus, meaning "mouth of an animal"—also source of the word muzzle. The noun muse, which in lowercase refers to a source of inspiration and when capitalized to one of the sister goddesses of Greek mythology, has no etymological link: that word comes from the Greek Mousa. The ultimate Greek origin of the word museum translates as "of the Muses."