Where does “затерять” come from?

затерять (Russian) comes from Russian теря́ть, from Old East Slavic теряти, from Serbo-Croatian terati, from Proto-Slavic těrjati.

Ancestry of “затерять”, step by step

Step	Language	Word	Meaning
1	Russian	теря́ть	—
2	Old East Slavic	теряти	wreck, ruin
3	Serbo-Croatian	terati	to force, make; to induce, cause; to drive, drive...
4	Proto-Slavic	těrjati	—

затерять — Etymology, Origin & Word History | Etymology Explorer