7 letters · 15 points in Scrabble
adjective characterized by great swelling waves or surges
originEtymology tree Proto-Indo-European *bʰelǵʰ-der. Proto-Germanic *belganą Proto-Germanic *bulgijō Old Norse bylgjabor. Middle English *bilwe English billow Proto-Indo-European *-kos Proto-Germanic *-gaz Proto-West Germanic *-g Old English -iġ Middle English -y English -y English billowy From billow + -y.
Etymology from Wiktionary, CC BY-SA 3.0