Where does “úṣṭra” come from?

úṣṭra (Proto-Dardic) comes from Sanskrit उष्ट्र, from Proto-Indo-Aryan úṣṭras, 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 “úṣṭra”, step by step

StepLanguageWordMeaning
1Sanskritउष्ट्रbuffalo; camel; a wagon or a cart drawn by either
2Proto-Indo-Aryanúṣṭras—
3Proto-Indo-Iranianúštrascamel; buffalo
4Proto-Indo-Europeanúǵtr-o-s—
5Proto-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 →