conscientious

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.”