Where does “sabwabwayira” come from?

sabwabwayira (Chichewa) comes from Turkic -sa-, from Finnish -isä — Front vowel variant of -isa.

Ancestry of “sabwabwayira”, step by step

Step	Language	Word	Meaning
1	Turkic	-sa-	—
2	Finnish	-isä	Front vowel variant of -isa