5 letters · 6 points in Scrabble
noun a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary)
originNot attested in Middle English; either from Old English *ēagor (“water, sea”) (attested in ēagorstrēam) or Old Norse ægir (“sea, ocean”); however, both possibilities fail to show the phonological outcome one would expect.
Etymology from Wiktionary, CC BY-SA 3.0