Where does “foson” come from?

foson (Hungarian) comes from Hungarian fos, from Hungarian fő, from Hungarian fej, from Proto-Uralic päŋe — head.

foson (Hungarian): superessive singular of fos

Definitions

Step	Language	Word	Meaning
1	Hungarian	fos	shitty, worthless; liquid excrement
2	Hungarian	fő	main, principal, key, chief, cardinal, core, most...
3	Hungarian	fej	head; head, mind, brain, intellect; heads,...
4	Proto-Uralic	päŋe	head

foson — Etymology, Origin & Word History | Etymology Explorer