staysail
fore-and-aft rigged sail whose luff can be affixed to a stay running forward from a mast to the deck, the bowsprit, or to another mast
en-US/ˈsteɪˌseɪl/
en-GB/ˈsteɪseɪl/
fore-and-aft rigged sail whose luff can be affixed to a stay running forward from a mast to the deck, the bowsprit, or to another mast