Oxford Dictionary English sinewy adjectiveadjective BrE BrE//ˈsɪnjuːi// ; NAmE NAmE//ˈsɪnjuːi// Body shape Add to my wordlistjump to other results(of a person or an animal) having a thin body and strong muscles synonym wiry The runner was tall and sinewy. See related entries: Body shapeSee sinewy in the Oxford Advanced American DictionaryCheck pronunciation: sinewy oxfordlearnersdictionaries.com