Where does “exclūdō” come from?

exclūdō (Latin) comes from Latin claudere, from Latin claudo, from Proto-Italic klaudō — close.

Ancestry of “exclūdō”, step by step

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

exclūdō — Etymology, Origin & Word History | Etymology Explorer