unflappability Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. the quality of being calm and not easily upset. Example Sentence She showed unflappability when faced with a difficult problem. More Example Sentences His unflappability impressed everyone at the event. Synonyms composure; calmness; poise Antonyms nervousness; agitation; anxiety Hear It! Say It! Write It! unflappability Switch to cursive Start Share with your friends: