Where does “otos” come from?

otos (Latin) comes from Latin otus, from Ancient Greek Ὦτος, from Ancient Greek οὖς, from Ancient Greek ὀδούς, from Proto-Hellenic odónts, from Proto-Indo-European h₃dónts, from Proto-Indo-European h₁ed- — to eat.

otos (Latin): accusative plural of ōtus