Where does “ស្លាប” come from?

ស្លាប (Khmer) comes from Proto-Mon-Khmer slaap — wing.

ស្លាប (Khmer): wing; feather

Definitions

Step	Language	Word	Meaning
1	Proto-Mon-Khmer	slaap	wing

ស្លាប — Etymology, Origin & Word History | Etymology Explorer