7 letters · 16 points in Scrabble
adjective similar to or containing or dissolved in water
adjective produced by the action of water
originFormed from Latin aqua + -ous (or from Medieval Latin aqueus), partly the analogy of Middle French aqueux (itself actually from Latin aquosus). Or based on the analogy of Latin terreus from terra.
Etymology from Wiktionary, CC BY-SA 3.0