involuntary

/in'vɔləntəri/
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Thân thiện
involuntary

A sudden loud noise caused an involuntary jump.

Definition
  1. Adjective:
    • Not done by choice or conscious decision: Refers to actions, movements, or reactions that occur automatically, without a person's deliberate intent or control.
    • Not subject to the control of the will: Describes processes, especially biological functions, that are regulated automatically by the body's nervous system and are not under conscious direction.
Usage
  • Used to describe physical reflexes, biological functions, or reactions that happen automatically.
  • Can describe actions or situations imposed on someone without their consent.
  • Often contrasts with "voluntary," which describes actions done by choice.
Examples
  • Describing a physical reaction:
    • She gave an involuntary shudder when she heard the loud noise.
    • Blinking is an involuntary response to protect the eyes.
  • Describing a lack of consent or control:
    • The confession was ruled inadmissible as it was deemed involuntary.
    • He found himself in a state of involuntary servitude.
Advanced Usage
  • Involuntary manslaughter: A legal term for unintentionally causing someone's death through recklessness or criminal negligence, but without malice.
    • The driver was charged with involuntary manslaughter after the fatal accident.
  • Involuntary muscle: (Biology) Muscle tissue, such as cardiac or smooth muscle, that contracts without conscious control.
    • The heart is made of involuntary muscle.
Variants and Related Words
  • Involuntarily (adverb): In a way that is not done by choice.
    • He sighed involuntarily.
  • Involuntariness (noun): The state or quality of being involuntary. (Less common)
Synonyms
  • Automatic: Done spontaneously without conscious thought.
  • Reflexive: Done as an automatic response to a stimulus.
  • Unintentional: Not done on purpose.
  • Compulsory: Required by rule or law, not optional. (Note: This relates more to obligation than biological control.)
Antonyms
  • Voluntary: Done, given, or acting of one's own free will.
  • Intentional: Done on purpose; deliberate.
  • Conscious: Aware of and responding to one's surroundings; done with awareness.
involuntary

A sudden loud noise caused an involuntary jump.

Adjective
  1. controlled by the autonomic nervous system; without conscious control
    • involuntary muscles
    • gave an involuntary start
  2. not subject to the control of the will
    • involuntary manslaughter
    • involuntary servitude
    • an involuntary shudder
    • It (becoming a hero) was involuntary. They sank my boat- John F.Kennedy

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