10 letters · 13 points in Scrabble
verb become bigger or greater in amount
verb make bigger or more
adjective becoming greater or larger
originEtymology tree English increase Proto-Indo-European *-onts Proto-Germanic *-ndz Proto-West Germanic *-andī Old English -ende Middle English -ynge English -ing English increasing From increase + -ing (participial suffix).
Etymology from Wiktionary, CC BY-SA 3.0