English word oread comes from Ancient Greek ὀρέσθαι

Detailed word origin of oread

Dictionary entry	Language	Definition
ὀρέσθαι	Ancient Greek (grc)
ὄρος	Ancient Greek (grc)
Ὀρειάς	Ancient Greek (grc)
Oread	Latin (lat)
oread	English (eng)	(Greek mythology) A mountain nymph; an anthropomorphic appearance of the spirit of a mountain.