Where does “forclosen” come from?

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

Ancestry of “forclosen”, step by step

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

Every word from Proto-Italic klaudō →Every word from Latin claudo →Every word from Latin claudere →