From Wiktionary, the free dictionary
From Proto-Turkic *-l. Cognate with Turkish -il.
-іл • (-ıl)
- Forms passive voice.
- беру (beru, “give”) + -іл (-ıl) → берілу (berılu, “to be given”)
Дүкен ашылды.- Düken aşyldy.
- The store was opened.
This suffix has special endings -ын/-ін/-н, when the root already has the "л" sound in it.
- ал- (to take) + -ын = алыну (to be taken)