6 letters · 7 points in Scrabble
adjective costing nothing
adverb without payment
originEtymology tree Proto-Indo-European *gʷerH- Proto-Indo-European *-tós Proto-Indo-European *gʷr̥Htós Proto-Italic *gʷrātos Latin grātus Proto-Indo-European *-yós Proto-Italic *-ios Old Latin -ios Latin -ius Latin -ia Latin grātiīs Latin gratisbor. English gratis Borrowed from Latin gratis.
Etymology from Wiktionary, CC BY-SA 3.0