Where does “uima-asu” come from?

uima-asu (Finnish) comes from Finnish asu, from Finnish -u, from Proto-Finnic -u.

uima-asu (Finnish): swimsuit

Definitions

Step	Language	Word	Meaning
1	Finnish	asu	attire, dress, suit, raiment; form, figure,...
2	Finnish	-u	Forms nouns from verbs. Most common with "e"- and...
3	Proto-Finnic	-u	—

uima-asu — Etymology, Origin & Word History | Etymology Explorer