retractable

/ri'træktəbl/

Thân thiện

The pilot checks the retractable landing gear before takeoff.

Definition

1. Adjective:
   • Capable of being drawn back or in: Describes an object, part, or mechanism that can be moved from an extended position to a stored or withdrawn position.
   • Capable of being withdrawn or disavowed: Describes a statement, promise, or opinion that can be formally taken back or revoked.

Usage

The adjective "retractable" is used to modify nouns, indicating their ability to be retracted. It is commonly used in technical, mechanical, and formal contexts.

Examples

• Mechanical/Object Context:
  • The cat's claws are retractable.
  • The new stadium features a retractable roof for all-weather events.
• Statement/Promise Context (less common):
  • The lawyer argued that the confession was not retractable.
  • He made a retractable offer, contingent on their approval.

Advanced Usage

• "Fully retractable": Emphasizes that an object can be completely withdrawn into its housing.
  • The aircraft's landing gear is fully retractable.
• Used attributively (before a noun) is the most common pattern: , , .

Variants and Related Words

• Retract (verb): To draw back or in; to withdraw a statement or promise.
  • The pilot will retract the landing gear after takeoff.
  • The newspaper was forced to retract the false story.
• Retraction (noun): The act of retracting; a withdrawn statement.
  • The mechanism allows for smooth retraction.
  • The journalist published a formal retraction.
• Retractable is the adjective form. There is no direct noun form "retractability" in common use; the concept is typically expressed as "the ability to retract."

Synonyms

• Withdrawable: Capable of being taken back or removed. (More general)
• Collapsible: Capable of being folded into a compact shape. (Similar in function for some objects)
• Reversible (for statements): Capable of being altered or undone. (Specific to promises/opinions)

Antonyms

• Fixed: Stationary and not movable.
• Permanent: Lasting or intended to last indefinitely without change.
• Irrevocable: Not able to be changed, reversed, or recovered.

Học thuật

Adjective

1. capable of being retracted
   • retractable landing gear