sinews Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. tendons or connective tissues in the body. Example Sentence Madison hurt her sinews while she was running. More Example Sentences He felt the sinews in his legs tighten as he ran. Synonyms tendons; ligaments; fibers Antonyms weakness; frailty; infirmity Hear It! Say It! Write It! sinews Switch to cursive Start Share with your friends: