From PIE *h2ous- (ear) — cognate with Latin 'auris' and Greek 'ous,' and the source of 'earwig' (ear-creature).
The organ of hearing in humans and other vertebrates.
From Proto-Indo-European *h2ews- ("to perceive, to hear"), through Proto-Germanic *auso and Old English eare ("ear"). The PIE root *h2ews- is the ancestor of the body-part word across many branches: Latin auris, Greek ous (genitive otos), Lithuanian ausis, Russian ukho, and Sanskrit karna (via a related form). Proto-Germanic *auso became Old English eare, Old High German ora (modern German Ohr), Old Norse