The story
- French · borrowed frommain“hand”
- English todaywith the manner
Corruption of "with the mainer", from French main (“hand”).
Words from the same roots
Frenchmain all →
mainmain droiteSumain
Etymology from Wiktionary, CC BY-SA 4.0.
with the manner
Today it means: in the very act; red-handed. Full definition →
French main