Definition

Noun: A mechanical device that allows motion in only one direction. It typically consists of a toothed wheel or bar (the rack) and a pivoting lever or bar (the pawl) that engages the teeth to prevent backward movement.

Usage

The word "rachet" (also commonly spelled "ratchet") is used to describe the device itself or, by extension, a process or mechanism that permits incremental change in one direction while preventing reversal. * The rachet on the winch prevented the heavy load from slipping back down. * The principle of a rachet is used in many tools like socket wrenches and hoists.

Examples

• He used a rachet to tighten the bolt in the confined space.
• The old gate was held open by a simple rachet and pawl mechanism.
• (Figurative) Critics warned of a regulatory rachet effect, where rules become increasingly strict and are never relaxed.

Advanced Usage

• Rachet Effect / Ratchet Effect: An economic or sociological process that is difficult to reverse once it has begun, similar to how a mechanical ratchet moves.
  • The inflation created a wage-price rachet that was hard to stop.
• To Rachet (something) up/down: (Verb, derived from the noun) To cause something to increase or decrease in a series of steps.
  • The company ratcheted up production to meet demand. (Note: The verb form is almost exclusively spelled "ratchet.")

Variants and Related Words

• Ratchet: The far more common modern spelling for both the noun and verb forms.
• Pawl: The component of a rachet that engages the teeth to prevent backward motion.
• Ratchet Wheel: The toothed wheel in a rachet mechanism.

Synonyms

• Click stop
• Detent (a similar device, often using a spring-loaded ball)
• Latch (a simpler fastening device)

Related Phrasal Verbs

• Ratchet up: To increase something by increments.
  • Tension ratcheted up as the deadline approached.
• Ratchet down: To decrease something by increments.
  • The government tried to ratchet down public spending.

Related Idioms

• Like a ratchet: Describes a process that moves forward step-by-step and cannot go back.
  • The negotiations advanced like a ratchet, with each small concession becoming permanent.

Noun

1. mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction