Proto-MSA

*ṭlf - to skim off (Kogan 2015:574)

The origin is uncertain, although an ultimate connection with PES *ṭlf ‘to snatch, to abduct’ is not unlikely. (Kogan 2015:574)

Mehri
ṭəlīfūt - skim on boiled milk (ML 409)
Jibbali
ṭɔ́lɔ́f - to skim off (JL 277)