IPA: /ˈstʌnseɪl/
KK: /ˈstʌnseɪl/
A type of sail that is attached to the outer edge of a larger sail to catch more wind and increase the speed of a sailing vessel.
The sailor adjusted the stunsail to take advantage of the strong winds.
Stunsail is formed from "stun" (from Middle English *stunnen*, meaning to stun or daze) and "sail" (from Old English *sægl*, meaning a piece of fabric used to catch wind). The word refers to a type of sail that is used to catch the wind when the ship is moving fast, often causing a dazing effect on the crew due to the speed.
Think of a sail that 'stuns' or surprises with its ability to catch wind quickly, making the ship move fast.
No commonly confused words.