adj. 25B6; adjective
an idle fellow : LAZY, indolent, slothful, work-shy, shiftless, inactive, sluggish, lethargic, listless; slack, lax, lackadaisical, good-for-nothing; informal bone idle.
I was bored with being idle : UNEMPLOYED, jobless, out of work, redundant, between jobs, workless, unwaged, unoccupied; Brit. informal on the dole, resting.
they left the machine idle : INACTIVE, unused, unoccupied, unemployed, disused; out of action, inoperative, out of service.
their idle hours : UNOCCUPIED, spare, empty, vacant, unfilled, available.
idle remarks : FRIVOLOUS, trivial, trifling, minor, petty, lightweight, shallow, superficial, insignificant, unimportant, worthless, paltry, niggling, peripheral, inane, fatuous; unnecessary, time-wasting.
idle threats : EMPTY, meaningless, pointless, worthless, vain, insubstantial, futile, ineffective, ineffectual; groundless, baseless.
industrious, employed, working, busy, serious.
25B6; verb
Lily idled on the window seat : DO NOTHING, be inactive, vegetate, take it easy, mark time, kick one's heels, twiddle one's thumbs, kill time, languish, laze, lounge, loll, loaf, slouch; informal hang around, veg out; Brit. informal hang about; N. Amer. informal bum around, lollygag.
Rob idled along the pavement : SAUNTER, stroll, dawdle, drift, potter, amble, maunder, wander, straggle; informal mosey, tootle; Brit. informal pootle, mooch.
he let the engine idle : TICK OVER.