Where does “mainsail” come from?

Mainsail derives from English main and sail, where main comes from Middle French main, from Latin manus meaning hand, and sail from Old English segl.

mainsail (English): The largest sail on a sailing vessel

Definitions

  1. The largest sail on a sailing vessel

Ancestry of “mainsail”, step by step

mainsail traces back through two separate lines of ancestry.

via English main

StepLanguageWordMeaning
1EnglishmainOf chief or leading importance; prime, principal;...
2Frenchmainhand; handball
3Middle Frenchmainhand
4Old Frenchmainhand
5Latinmanushand; bravery, valor; violence, fighting
6Proto-Italicmanushand
7Proto-Indo-Europeanman-human being; man; hand

via English sail

StepLanguageWordMeaning
1EnglishsailA piece of fabric attached to a boat and arranged...
2Middle EnglishsaileAlternative form of assailen
3Proto-Germanicsegląsheet; sail
4Proto-Germanicsiglą
Every word from Proto-Indo-European man-Every word from Proto-Italic manusEvery word from Latin manus