IPA: //ˈmuːnseɪl//
KK: /ˈmunˌseɪl/
A type of sail used on a boat, specifically designed to catch the wind when sailing at night or in low light conditions.
The sailor adjusted the moonsail to take advantage of the gentle night breeze.
Moonsail is formed from "moon" (from Old English *mōna*, meaning the natural satellite of Earth) and "sail" (from Old English *sægl*, meaning a piece of fabric used to catch wind and propel a vessel). The word "moonsail" refers to a sail that is associated with or inspired by the moon, often evoking imagery of sailing under moonlight.
Imagine a sail that catches the gentle light of the moon, combining the idea of the moon as a celestial body and the sail as a means of travel on water.
No commonly confused words.