Where does “отговори́ть” come from?

отговори́ть (Russian) comes from Russian говори́ть, from Proto-Slavic govorìti, from Proto-Indo-European gow(H)- — to call, cry.

Ancestry of “отговори́ть”, step by step

Step	Language	Word	Meaning
1	Russian	говори́ть	to speak; speak
2	Proto-Slavic	govorìti	—
3	Proto-Indo-European	gow(H)-	to call, cry

отговори́ть — Etymology, Origin & Word History | Etymology Explorer