9 letters · 16 points in Scrabble
adjective of or relating to a summation or produced by summation
originEtymology tree English sum Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-tós Proto-Indo-European *-eh₂tos Proto-Italic *-ātos Latin -ātuslbor. English -ate Proto-Indo-European *-wós Proto-Indo-European *-iHwósder. Latin -īvus Old French -ifbor. Middle English -yf English -ive English -ative English summative From sum + -ative.
Etymology from Wiktionary, CC BY-SA 3.0