supinate
verb medical specialized uk/ˈsuː.pɪn.eɪt/ us/ˈsuː.pəˌneɪt/
[ T ]向上转动（身体部位，如手掌），使仰转
to turn the bottom of a body part, for example the palms of the hands, upward
Volunteers were asked to supinate their forearm. 志愿者被要求向上转动手臂。
[ I or T ]仰卧
to put yourself in, or to be put in a supine position (= on your back with your face upward)