Where does “fingo” come from?

fingo (Latin) comes from Proto-Indo-European dʰeyǵʰ- — to knead; to form, to shape.

Ancestry of “fingo”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	dʰeyǵʰ-	to knead; to form, to shape

fingo — Etymology, Origin & Word History | Etymology Explorer