plural of idle game

(engineering) A wheel placed between two others to transfer motion from one to the other without changing the direction.

plural of idle wheel

plural of idle threat

A threat made by a person who does not mean to carry it out, and which perhaps shouldn't be taken seriously by others.

An asset that is used rarely or never at all.

plural of idling speed

The speed, measured in revolutions per minute, of an internal-combustion engine when it is running, but is at rest and without power being applied, typically with transmission in neutral.

(simile, archaic) Synonym of lazy as Ludlam's dog

Alternative form of Idle hands are the devil's workshop