unfastening Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to open or release something that is fastened or secured. Example Sentence She was unfastening her seatbelt when the car suddenly stopped. Synonyms undo; loosen; untie Antonyms fasten; secure Hear It! Say It! Write It! unfastening Switch to cursive Start Share with your friends:
