оставля́ть

common #995B2

verbimperfective perfective is оста́вить

1.
to leave, to leave behind
Он всегда́ оставля́ет ключи́ на столе́.
He always leaves his keys on the table.
Also of things left as a result: traces, a message, an impression.
2.
to abandon, to desert
Он оставля́ет семью и уезжа́ет.
He is abandoning his family and going away.
Of people, places or duties one walks away from.
3.
to give up, to drop, to stop
Она́ не оставля́ет наде́жды найти́ рабо́ту.
She is not giving up hope of finding a job.
Object is an activity, attempt, hope or habit.
4.
to leave alone
Журнали́сты не оставля́ют его в поко́е.
The journalists won't leave him alone.
Usually with в покое.
5.
to keep (for oneself)
Я оставля́ю пода́рок себе.
I'm keeping the present for myself.
Typically with себе.

Examples

Не оставля́й меня одну.
Don't leave me alone.
Не оставля́й велосипе́д под дождём.
Don't leave the bicycle in the rain.
Не оставля́й меня здесь.
Don't leave me here.
Он оставля́ет дома́шнюю рабо́ту наполовину сделанной.
He leaves his homework half-finished.
Не оставля́й меня!
Don't leave me behind!
Не оставля́йте включённым дви́гатель.
Don't leave the engine running.
Я оставля́ю тебя за́втра.
I'm leaving you tomorrow.
Никто не должен оставля́ть свои́х друзе́й в беде́.
No one should desert his friends.

Imperative
ты	оставля́й
вы	оставля́йте

Active present	оставля́ющий	leaving, that leaves, remaining
Active past	оставля́вший	leaving, abandoning, that was leaving, which was leaving
Passive present	оставля́емый	being left, being abandoned, being retained
Passive past	-
Gerund present	оставля́я	while doing (present)
Gerund past	оставля́в оставлявши	while doing (past)

Verb	Prefix	Meaning
оставля́ть	-	to leave; to abandon; to give up; to leave alone; to keep (for oneself)
предоставля́ть	пред-	to provide; to grant; to leave (to someone)
предоставля́ться	пред-	to be provided