Where does “forclos” come from?

forclos (Old French) comes from Old French clore, from Latin claudere, from Latin claudo, from Proto-Italic klaudō — close.

Ancestry of “forclos”, step by step

Step	Language	Word	Meaning
1	Old French	clore	to close; to enclose
2	Latin	claudere	present active infinitive of claudō;...
3	Latin	claudo	I shut, close, lock; I imprison, confine; I...
4	Proto-Italic	klaudō	close

forclos — Etymology, Origin & Word History | Etymology Explorer