idle

idle adjective uk/ˈaɪdl/ us idle adjective
(NOT SERIOUS)

not serious or having no real purpose

праздный, тщетный, пустой
idle gossip This is no idle threat. idle adjective
(ENGINE)

If an engine or machine idle s, it runs slowly but does not move or do any work.

работать вхолостую
He left the engine idling and ran into the shop. idle verb
(TIME)

to spend time doing nothing

бездельничать
We saw her idling in the school grounds.
Фразовые глаголы idle sth away