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involuntary
/ɪnˈvɒləntəri/
What does "involuntary" mean?
unintentionalShe made an involuntary gasp when she saw the surprise.
Her reaction was not deliberate; it happened automatically.
How to use "involuntary" correctly?
formal
done without conscious control or intention
The involuntary muscles in the body control functions like breathing.
These muscles work automatically without conscious effort.
He gave an involuntary shudder at the thought of the horror movie.
His reaction was instinctive and not planned.
Often used in medical, psychological, or physiological contexts to describe automatic bodily functions or reflexes.
Law
formal
not done by choice; forced
The defendant claimed the confession was involuntary and coerced by police.
The confession was not given freely but under pressure.
In legal contexts, refers to actions taken without free will, often due to coercion or duress.
Collocations
involuntary manslaughterunintentional killing due to reckless behaviorinvoluntary movementautomatic physical action not controlled by the mindinvoluntary memoryspontaneous recollection triggered by sensory input
Related Phrases
Pro Tip
Avoid confusion with 'unwilling'
'Involuntary' describes actions done without control or intention, while 'unwilling' describes actions done reluctantly. Compare: 'an involuntary shiver' (automatic) vs. 'an unwilling participant' (reluctant).
Gold Rule
Use for automatic reactions
Reserve 'involuntary' for actions or movements that occur without conscious thought, such as reflexes, muscle contractions, or spontaneous memories.
Legal context specificity
In legal terminology, 'involuntary' specifically refers to actions taken under coercion or duress, not merely unintentional actions.
Word Origin
From Latin *involuntarius*, from *in-* (not) + *voluntarius* (willing, from *voluntas* meaning 'will'). The prefix *in-* negates the root, while *voluntarius* derives from *voluntas* (will), related to *velle* (to wish). First recorded in English in the late 16th century.
Usage Notes
Commonly used to describe actions or reactions that occur without conscious thought, such as reflexes or automatic bodily functions. In legal contexts, it specifically refers to actions taken under duress or coercion. Avoid confusing with 'unwilling,' which implies reluctance rather than lack of control.
Word Breakdown
in-
not
prefixvoluntary
willing, done by choice
rootEnglish Dictionary