unimportant russian
пустя́к
nothing/trifle/unimportant thing
нева́жно
it is unimportant, never mind, not very well, poorly, indifferently
нева́жный
unimportant, poor, indifferent, not much of a
несерьёзный
not serious, unfounded, light, frivolous, unimportant, insignificant
потрепа́ться
get worn out, twaddle, prattle
to talk about something unimportant
малова́жный
unimportant, of little importance, of small import
малозна́чащий
of little significance, unimportant
малозначи́тельный
of little significance, unimportant
малосуще́ственный
not substantial, unimportant