Where does “Okhrana” come from?

Okhrana (English) comes from Russian охра́на, from Polish ochrona, from Proto-Slavic *o(b)xorna.

Ancestry of “Okhrana”, step by step

Step	Language	Word	Meaning
1	Russian	охра́на	guard
2	Polish	ochrona	—
3	Proto-Slavic	*o(b)xorna	—