Where does “cen” come from?

cen (Ahtna) comes from Ahtna cʼ-, from Ahtna ł-, from Proto-Athabaskan *-ɬ.

Ancestry of “cen”, step by step

Step	Language	Word	Meaning
1	Ahtna	cʼ-	—
2	Ahtna	ł-	—
3	Proto-Athabaskan	*-ɬ	—

cen — Etymology, Origin & Word History | Etymology Explorer