Where does “оснащаться” come from?

оснащаться (Russian) comes from Russian оснащать, from Russian -а́ть, from Proto-Slavic -ati, from Proto-Slavic -ěti, from Proto-Balto-Slavic -ēˀtei, from Proto-Indo-European -éh₁ti — Creates stative verbs from perfective roots;...

Ancestry of “оснащаться”, step by step

StepLanguageWordMeaning
1Russianоснащатьto rig; to fit out, to equip, to outfit
2Russian-а́тьThe infinitive suffix for many verbs. Usually indicates an imperfective verb
3Proto-Slavic-atiFrom imperfective verbs, forming...
4Proto-Slavic-ětiInherited, stative; Deadjectival, inchoative;...
5Proto-Balto-Slavic-ēˀtei
6Proto-Indo-European-éh₁tiCreates stative verbs from perfective roots;...
Every word from Proto-Indo-European -éh₁tiEvery word from Russian -а́тьEvery word from Proto-Slavic -ěti