Where does “kawp-” come from?

kawp- (Proto-Indo-Iranian) comes from Proto-Indo-European kwep- — to smoke, to steam; to boil; aroma, strong odor.

Ancestry of “kawp-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	kwep-	to smoke, to steam; to boil; aroma, strong odor

kawp- — Etymology, Origin & Word History | Etymology Explorer