8 letters · 15 points in Scrabble
verb ride standing on a surfboard with an attached sail, on water
originEtymology tree Proto-Indo-European *h₂weh₁- Proto-Indo-European *-ti Proto-Indo-European *h₂wḗh₁ti Proto-Indo-European *h₂wéh₁n̥ts Proto-Germanic *windaz Proto-West Germanic *wind Old English wind Middle English wynd English wind Middle English suffe? English suff? English surf English windsurf From wind + surf.
Etymology from Wiktionary, CC BY-SA 3.0