Merriam-Webster's Word of the Day

Merriam-Webster's Word of the Day for September 3, 2026 is: recalcitrant • \rih-KAL-suh-trunt\  • adjective Recalcitrant is a formal word typically used to describe someone who stubbornly refuses to obey rules or orders. Recalcitrant can also describe something that is difficult to manage or operate. // The magazine, aimed at parents and caregivers of young children, will include the latest in child development science as well as practical information, like tricks for persuading even the most recalcitrant toddler to cooperate. See the entry > Examples: “One particularly recalcitrant driver … managed to rack up 29 speeding tickets during the 10-school-day span.” — Dave Werner, The Press-Republican (Plattsburgh, New York), 20 May 2026 Did you know? When given an order or command, a recalcitrant person (or animal) digs in their heels. They will not give an inch, so to speak, immovable in their determination to defy the rules. This makes a great deal of sense, etymologically, as recalcitrant traces back to calx, the Latin word for “heel.” (Calx is also responsible for such English words as calcaneus, “the large bone of the human heel,” and—mention this at your next pizza party—calzone.) From calx, Latin users formed first the verb calcitrare (“to kick”) and then recalcitrare (“to kick back”). In Late Latin, recalcitrare was used figuratively to mean “to be stubbornly disobedient,” leading to the English adjective we apply today to stubborn mules both human and asinine.

Merriam-Webster's Word of the Day for September 1, 2026 is: conscientious • \kahn-shee-EN-shus\  • adjective Conscientious describes someone who is concerned with doing things correctly. It can be used as a synonym for both meticulous and careful. // She has always been a conscientious worker committed to painstaking research. See the entry > Examples: “Earth-friendly, conscientious gardeners learn to slow down and pay attention not only to plants but to the many creatures that share the garden. ... The garden teaches us valuable lessons. It reminds us that balance is achieved not through sorting the natural world into neat categories, but by respecting nature and allowing it to reveal to us its own complicated, interdependent and beautiful gray areas.” — Rita Perwich, The San Diego Union-Tribune, 4 July 2026 Did you know? As Mahatma Gandhi once wrote, “There is a higher court than courts of justice, and that is the court of conscience.” A person who is conscientious makes sure that they are judged well by such a court. This is true for someone who is “governed by their conscience” as the oldest sense of the word is defined—as in “a conscientious leader”—but it is also true for the conscientious person paying close, careful attention to the task at hand. Conscientious came to English from French, centuries after Middle English had adopted conscience from Anglo-French; both ultimately come from the Latin verb scire, meaning “to know.”

Merriam-Webster's Word of the Day for August 30, 2026 is: illustrious • \ih-LUSS-tree-us\  • adjective Illustrious describes a person or deed that is highly admired and respected. // During the ceremony, the illustrious star of stage and screen was presented with a lifetime achievement award. See the entry > Examples: “Two of the most respected professors—an academic power couple—invited me to their home for dinner. I was flattered and excited. When we sat down at the table, my heart sank. The first dish they served was steak tartare. Raw beef, no matter how well seasoned, no matter how swanky the cut, is not my jam. ... And in the home of these illustrious professors, I was ashamed about that. I feared they would consider me unsophisticated for not liking the dish.” — Leslie John, Revealing: The Underrated Power of Oversharing, 2026 Did you know? Today’s spotlight is on illustrious, from the Latin adjective illustris, meaning “shining brightly with light.” Illustris itself was probably a back-formation of the Latin verb illustrare, a word with varied meanings, among them “to light up,” “to make clear,” and “to embellish.” (Our word illustrate also comes from illustrare, of course; its original meaning was “to enlighten intellectually, culturally, or spiritually.”) At one time, illustrious could be used synonymously with its immediate Latin forbear to describe things that glow brightly, but that meaning is now considered archaic. The word today is almost exclusively used to describe something—such as a career or achievement—that stands out figuratively, shining brilliantly in the mind’s eye.

Merriam-Webster's Word of the Day for August 28, 2026 is: cogent • \KOH-junt\  • adjective Cogent is a formal word that describes something that is very clear and easy for the mind to accept and believe. It is used as a synonym of convincing. // At the town meeting, citizens presented many cogent arguments in support of building a new senior center. See the entry > Examples: “The history of art reads here as one long, free verse poem-in-progress, gorgeous and absorbing. Even so, many of the most memorable moments come in the form of cogent micro-essays, smartly curated ensembles of work bearing a legible, lucid premise.” — Leah Ollman, The Los Angeles Times, 24 Apr. 2026 Did you know? A cogent argument is one that really drives its point home because it is clear, coherent, and readily understandable, and perhaps also because of the etymological history of cogent. Cogent comes from the Latin verb cōgere, meaning “to drive or force together.” Something described as cogent fuses thoughts and ideas into a meaningful whole that others can readily grasp and accept. A cogent explanation is a convincing one, and cogent analysis has us nodding along because it is clear and pertinent. Cōgere was formed in Latin by combining the prefix co- with the verb agere, “to drive, lead, or act,” a root which is also the source of our familiar noun agent. Handily enough, one definition of agent is “a means or instrument by which a guiding intelligence achieves a result.” It follows logically then that cogency is often a worthwhile agent, indeed.

Merriam-Webster's Word of the Day for August 26, 2026 is: devolve • \dih-VAHLV\  • verb To devolve is to gradually go from an advanced state to a less advanced state, or to pass something, such as responsibility or power, from one person or group to another at a lower level of authority. // Somehow the debate devolved into a petty competition to see who could get more applause. // Community leaders hope that the new government will devolve more power to the community itself. See the entry > Examples: “He accused board members of personally profiting from the parking and landscaping policies. Board meetings soon devolved into a cacophony of charges, countercharges and shouting.” — Elizabeth Williamson, The New York Times, 19 Nov. 2025 Did you know? Evolve? Check. Revolve? Check. Devolve? Now we’re on a roll—literally. All three of these words (and more) evolved from the Latin verb volvere, meaning “to set in a circular course, to cause to roll, to bring round.” The Latin ēvolvere means “to roll out or away”; revolvere means “to roll back to a starting point”; and dēvolvere means “to roll (something) down.” In its earliest uses in the 15th century, devolve literally meant “to roll onward or downward.” Today the word is typically used for a more figurative rolling down, as when an organization devolves power—that is, passes power down—to those at a lower level of authority, or when a deteriorating situation is described as “devolving into chaos.” One word, multiple uses. That’s just how English rolls.