Word Origin & History
idleO.E. idel "empty, void, useless," common W.Gmc. (cf. O.S. idal, O.Fris. idel "empty, worthless," O.Du. idil, Ger. eitel "vain, useless, mere, pure"), of unknown origin. Idle threats preserves original sense; meaning "lazy" is c.1300. The verb sense of "running slowly and steadily without transmitting
EXPANDpower" (as a motor) first recorded 1916.
COLLAPSE