Where does “ehkäisy” come from?

ehkäisy (Finnish) comes from Finnish ehkäistä, from Finnish ehkä, from Proto-Finnic ehkä.

ehkäisy (Finnish): prevention; contraception; When used as modifier...

Definitions

Step	Language	Word	Meaning
1	Finnish	ehkäistä	To prevent, keep from occurring, avert, block,...
2	Finnish	ehkä	perhaps, maybe; although, though
3	Proto-Finnic	ehkä	—

ehkäisy — Etymology, Origin & Word History | Etymology Explorer