Merriam-Webster's Word of the Day for December 7, 2025 is: enigmatic • \en-ig-MAT-ik\  • adjective Something or someone described as enigmatic is mysterious and difficult to understand. // The band’s lead singer has always been an enigmatic figure, refusing to use social media or even sit for interviews. See the entry > Examples: “For thirty years, Perlefter’s carpet hung peacefully on the wall in the museum, delighting visitors with its beauty, its unusual palette, enigmatic motifs and its echoes of four empires.” — Dorothy Armstrong, Threads of Empire: A History of the World in Twelve Carpets, 2025 Did you know? The noun enigma can refer to a puzzle, a riddle, a question mark. It’s no mystery then, that the adjective enigmatic describes what is hard to solve or figure out. An enigmatic person, for example, may be someone with a bit of je ne sais quoi. What’s behind a stranger’s enigmatic smile? Your guess is as good as ours. Does the vocabulary in the short story you’re reading render it a tad enigmatic? Better grab a dictionary! Both enigma and enigmatic come from the Greek verb ainissesthai, meaning “to speak in riddles.”