adj. 25B6; adjective TENSE, nervous, on edge, anxious, apprehensive, uneasy, unsettled; twitchy, nervy, keyed up, restive, skittish, neurotic, insecure; irritable, touchy, tetchy, testy, crotchety, prickly; informal uptight, jumpy, wired, snappy; Brit. informal strung up.
calm.