Pronunciation: [t͡ʃˈə͡ʊk lˈʌf] (IPA) 
"Choke luff" is a sailing term that refers to the maneuver of pointing the bow of the boat into the wind to slow down or stop the vessel. The word is pronounced as "tʃoʊk lʌf", with the phonetic transcription indicating the "tʃ" sound similar to "ch" in "chair" and the "ʌ" sound similar to "u" in "up". The term is derived from the nautical language and is often used in competitive sailing to gain an advantage over other boats.
Choke luff is a nautical term referring to a specific sailing maneuver performed to depower a sail. It is a technique used to reduce the sail's efficiency and thereby decrease its ability to generate lift. The term is derived from two key elements: "choke" and "luff."
"Choke" in this context represents the action of partially closing or tightening an adjustable sail control like a sheet or a halyard. By doing so, the excess cloth in the sail is gathered or restrained, restricting its ability to catch the wind effectively. This process increases the sail's resistance and reduces its overall power.
"Luff" is the forward edge of a sail, usually the leading edge where it meets the wind. The luff is typically attached to a mast or a stay and is responsible for the airflow that fills the sail, creating lift and propelling the vessel forward.
Therefore, when the adjustable sail control is tightened, reducing the luff's ability to catch the wind properly, the term "choke luff" is used to describe this intentional depowering maneuver. Choking the luff inhibits the sail from fully utilizing wind power, resulting in reduced speed and increased stability for the vessel.
Choke luff is often employed in strong wind conditions or gusty weather to prevent overpowering or excessive strain on the boat, helping to maintain control and stability while sailing.
The term "choke luff" has nautical origins and is used to describe an undesirable situation where the sails of a sailing ship are not properly trimmed or adjusted. Here is the etymology of the key components:
1. Choke: In sailing, "choke" refers to the act of pulling in or tightening a rope or line. It comes from the Middle English word "choken" or "chokene", which meant to strangle or suffocate, derived from the Old English word "aceocian". Over time, "choke" came to have the additional meaning of constriction or tightening, which is why it is used in sailing to describe the act of tightening ropes or lines.
2. Luff: "Luff" is a nautical term that refers to the forward edge of a sail. It comes from the Middle English word "lof", which meant the weather side of a ship.
