immodest Get Printable Handwriting (im-mod-est) 3 syllables Learn It! Spelling Test Definition adjective. not decent in appearance or behavior; shameless; overly proud or assertive; arrogant or impudent; conceited Example Sentence By his boasting behavior I could tell he was immodest. Synonyms indecent; shameless; conceited Antonyms modest; prudish Share with your friends: