7 letters · 11 points in Scrabble
adjective not agitated; without losing self-possession
adjective (of weather) free from storm or wind
originEtymology tree English calm Proto-Indo-European *-yōs Proto-Indo-European *-tHós Proto-Indo-European *-istHos Proto-Germanic *-istaz Proto-West Germanic *-ist Old English -est Middle English -est English -est English calmest From calm + -est.
Etymology from Wiktionary, CC BY-SA 3.0