Ephemeral etymology in English

English word ephemeral comes from Ancient Greek ἐπί, Ancient Greek ἡμέρα

Dictionary entry	Language	Definition
ἐπί	Ancient Greek (grc)
ἡμέρα	Ancient Greek (grc)
ἐφημέριος	Ancient Greek (grc)
ἐφήμερος	Ancient Greek (grc)
ephemerus	New Latin (la-new)
ephemeral	English (en)	(biology) Existing for only one day, as with some flowers, insects, and diseases.. (geology, of a body of water) Usually dry, but filling with water for brief periods during and after precipitation.. Lasting for a short period of time. Something which lasts for a short period of time.

Ephemeral etymology