undeveloped Get Printable Handwriting Rhymes Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. not yet fully developed or improved. Example Sentence The undeveloped embryo of a duck is a delicacy in the Philippines. More Example Sentences They explored the undeveloped parts of the park. Synonyms raw; unripe; unfinished Antonyms developed; advanced; mature Hear It! Say It! Write It! undeveloped Switch to cursive Start Rhymes Three Syllable Rhymes (2) developed enveloped Four Syllable Rhymes (1) undeveloped Five Syllable Rhymes (1) underdeveloped Share with your friends: