- idle
- O.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 power" (as a motor) first recorded 1916.