Where does “клисура” come from?

клисура (Serbo-Croatian) comes from Ancient Greek κλεισούρα, from Latin clausūra, from Latin clausus, from Latin claudere, from Latin claudo, from Proto-Italic klaudō — close.

клисура (Serbo-Croatian): gorge, ravine; rock, crag

Definitions

gorge, ravine; rock, crag

Ancestry of “клисура”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	κλεισούρα	narrow pass, defile
2	Latin	clausūra	lock, bar, bolt
3	Latin	clausus	closed, inaccessible; having been closed;...
4	Latin	claudere	present active infinitive of claudō;...
5	Latin	claudo	I shut, close, lock; I imprison, confine; I...
6	Proto-Italic	klaudō	close

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