8 letters · 9 points in Scrabble
verb stir up (water) so as to form ripples
verb occur in soft rounded shapes
verb move in a wavy pattern or with a rising and falling motion
originFirst attested in 1664; borrowed from New Latin undulātus, the perfect passive participle of undulō (see -ate (verb-forming suffix)), from an unattested *undula (“small wave”), diminutive of Latin unda (“wave”).
Etymology from Wiktionary, CC BY-SA 3.0