6 letters · 9 points in Scrabble
verb sign jointly
verb sign and endorse (another person's signature), as for a loan
originEtymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-der. English co- English sign English cosign From co- + sign.
Etymology from Wiktionary, CC BY-SA 3.0