Where does “uṣṭras” come from?

uṣṭras (Proto-Indo-Aryan) comes from Proto-Indo-Iranian úštras, from Proto-Indo-European úǵtr-o-s, from Proto-Indo-European -os — Creates action nouns or result nouns from verbs;...

Ancestry of “uṣṭras”, step by step

StepLanguageWordMeaning
1Proto-Indo-Iranianúštrascamel; buffalo
2Proto-Indo-Europeanúǵtr-o-s—
3Proto-Indo-European-osCreates action nouns or result nouns from verbs;...
Every word from Proto-Indo-European -os →Every word from Proto-Indo-European úǵtr-o-s →Every word from Proto-Indo-Iranian úštras →