involuntariness

uncountable

The state of being involuntary; unwillingness; automatism.

Japanese Meaning

自発的でない状態 / 不本意な様態 / 自動的な行動

The involuntariness of her reaction revealed how deep the shock had been.

彼女の反応が不随意だったことは、その衝撃の深さを明らかにした。

Sense（1）

The state of being involuntary; unwillingness; automatism.