screw-propeller

The pilot checks the screw-propeller before takeoff.

Definition

Noun: A screw-propeller is a type of propeller consisting of a set of twisted blades (like a screw thread) mounted on a rotating shaft, used to propel a ship or aircraft through water or air.

Usage Examples

• (The ship's rotating blades moved it through the water.)
• (A propeller with twisted blades that pulled the plane through the air.)

Advanced Usage

• "Screw-propeller" vs. "propeller": While "propeller" is the general term, "screw-propeller" emphasizes the helical, screw-like shape of the blades, often used in marine contexts.
  • The submarine's screw-propeller was specially designed for quiet operation. (A marine propeller with a screw-like design.)

Variants and Related Words

• Screw (n): a metal fastener with a helical thread, or a device with a similar shape.
  • The screw on the propeller was tightened to secure the blade. (The threaded fastener.)
• Propeller (n): a device with rotating blades that propels a vehicle.
  • The airplane's propeller spun rapidly before takeoff. (The rotating blades that move the aircraft.)

Synonyms

• Propeller: a general term for a device with rotating blades.
• Screw: (in nautical contexts) short for "screw-propeller."
  • The ship's screw turned slowly as it docked. (The screw-propeller of the vessel.)

Related Idioms

• "Put a screw on": (informal) to apply pressure or force.
  • The captain put a screw on the engine to increase speed. (He applied force to the propeller system.)

Phrasal Verbs (None directly applicable, but related verb usage)

• Screw in: to insert or tighten by turning.
  • The mechanic screwed in the propeller blade securely. (He tightened it into place.)