Definition

Something that happens without a person's control or choice, often automatically or instinctively.

Example

She had an involuntary reaction to the loud noise.

Conversation

Did you see how she jumped when the door slammed?

Yeah, that was an involuntary reaction for sure!

I wonder if my reactions are just as involuntary sometimes.

Probably! It's natural to have those moments.

Synonyms & Antonyms

Root Explanation

Involuntary → It is formed from "in-" (meaning not) and "voluntary" (from Latin "voluntarius", meaning willing or of one's own choice). The word "involuntary" describes actions or responses that are not made by conscious choice or will.

Memory Tip

Think of 'not willing' ('in-') when you hear 'involuntary' — it refers to actions that happen without your conscious choice.

Visually Confused Words