Etymology of the English word onager
the English word onager
derived from the Latin word onager (wild ass)
derived from the Greek word onagros, ὄναγρος
derived from the Greek word agrios, ἄγριος (wild (as pertaining to the country), literally (natural) or figuratively (fierce))
derived from the Proto-Indo-European root *agro-
derived from the Greek word agrion
derived from the Greek word onos, ὄνος (a donkey)