jackstay
/ˈdʒæksteɪ/noun
1- Nautical a rope, bar, or batten placed along a ship's yard to bend the head of a square sail to【航海】船帆支索, 桅桁支索。
1.1
- a line secured at both ends to serve as a support, e.g. for an awning支索（起支撑作用, 如支撑遮阳棚）。