recoil (n.) Look up recoil at Dictionary.com
c.1300, "retreat," from recoil (v.).
recoil (v.) Look up recoil at Dictionary.com
early 13c., "force back, drive back," from Old French reculer "to go back, recede, retreat," from Vulgar Latin *reculare, from Latin re- "back" (see re-) + culus "backside." Meaning "shrink back, retreat" is first recorded c.1300; and that of "spring back" (as a gun) in 1520s. Related: Recoiled; recoiling.