Meaning

noun a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary)

adjective having or showing keen interest or intense desire or impatient expectancy

originEtymology tree Proto-Indo-European *h₂eḱ- Proto-Indo-European *-rós Proto-Indo-European *h₂eḱrós Proto-Italic *akris Classical Latin ācer Late Latin ācrus Old French aigrebor. Middle English egre English eager Inherited from Middle English egre, eger, from Old French aigre, egre (modern French aigre), from Latin ācrus, variant of ācer (“sharp, keen”); see acid, acerb, etc. Compare vinegar, alegar.

Etymology from Wiktionary, CC BY-SA 3.0