smouldering Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. oradjective. 1 to burn slowly with smoke and usually without flame; 2 to be in a state of emotional or mental turmoil Chiefly British. Example Sentence I put another log on the smouldering campfire. Synonyms simmer; fester; seethe; fume; stew Antonyms explode Hear It! Say It! Write It! smouldering Switch to cursive Start Share with your friends: