9 letters · 16 points in Scrabble
noun anything short-lived, as an insect that lives only for a day in its winged form
adjective lasting a very short time
originFrom New Latin ephemerus, from Ancient Greek ἐφήμερος (ephḗmeros), the more common form of ἐφημέριος (ephēmérios, “of, for, or during the day, living or lasting but for a day, short-lived, temporary”), from ἐπί (epí, “on”) + ἡμέρα (hēméra, “day”).
Etymology from Wiktionary, CC BY-SA 3.0