Meaning

adjective lying face upward

adjective offering no resistance; ; - Theodore Roosevelt

originThe adjective is borrowed from Latin supīnus, from *sup- (see sub (“under”)) + -īnus (“of, pertaining to”). The word is cognate with Catalan supí, Italian supino, Old French sovin, Middle French souvin, Anglo-Norman supin, Old Occitan sobin, sopin, Portuguese supino, Spanish supino. Partly displaced Old English upweard (“upward, supine”), whence Modern English upward. The noun is from Late Middle…

Etymology from Wiktionary, CC BY-SA 3.0