6 letters · 9 points in Scrabble
verb be abundant or plentiful; exist in large quantities
verb be in a state of movement or action
origin* First attested around 1325. * From Middle English abounden, abounde, from Old French abonder, abunder, from Latin abundāre (“overflow”), which comes from ab (“from, down from”) + undō (“surge, swell, rise in waves, move in waves”), from unda (“wave”).
Etymology from Wiktionary, CC BY-SA 3.0