luff

詳細解釋：

luff

n.（名詞）
Nautical
【航海】
The act of sailing closer into the wind.
搶風行駛：向風裡駛得更近的行動
The forward side of a fore-and-aft sail.
縱帆前緣：縱帆的前面部分
Archaic The fullest part of the bow of a ship.
【古語】 （古）船首彎曲的部分
v.（動詞）
luffed,luff.ing,luffs
v.intr.Nautical （不及物動詞）【航海】
To steer a sailing vessel closer into the wind, especially with the sails flapping.
搶風駛帆：把船航向更接近風裡，尤指船帆同時張開
To flap while losing wind. Used of a sail.
無風張帆：無風時張帆。用於航海
v.tr.（及物動詞）
Nautical To sail (a vessel, such as a yacht) closer into the wind during a race so as to prevent an opponent`s craft from passing on the windward side.
【航海】 搶到對手的上風那一邊：在賽艇時把（船隻，比如遊艇）駛向上風方向以避免對手的船駛到順風邊上
To raise or lower (the boom of a crane or derrick).
升降：使起重機的吊臂上升或下降

來源：
Middle English lof [spar holding out the windward tack of a square sail]
中古英文 lof [阻止橫帆順風搶風行駛的桅桿]
from Old French
源自 古法文
[probably of Germanic origin]
[可能源於日耳曼語]