ox

Etymology 1

From Middle English oxe, from Old English oxa, from Proto-West Germanic *ohsō, from Proto-Germanic *uhsô (compare West Frisian okse, Dutch os, German Ochse), from Proto-Indo-European *uksḗn. Cognate with Welsh ych (“ox”), Tocharian A ops, Tocharian B okso (“draft-ox”), Avestan 𐬎𐬑𐬱𐬀𐬥 (uxšan, “bull”), Sanskrit उक्षन् (ukṣán).

noun

1. An adult castrated male of cattle (B. taurus), especially when used as a beast of burden.
2. Any bovine animal (genus Bos). A neat, a beef.
   Here the same four kinds are mentioned ... These are sheep, goats, camels and oxen. 1934, commentary on the Qur'an (Sura 39 verse 6) by Abdullah Yusuf Ali

Etymology 2

Clipping of oxygen.

noun

1. Abbreviation of oxygen.
   I'm super excited to be on the summit of K2! No Ox! (coughs) It was hard. 2020, Carla Perez, 42:40 from the start, in Breathtaking: K2 - The World's Most Dangerous Mountain | Eddie Bauer, YouTube, Eddie Bauer, archived from the original on 2020-05-22