不ふ随ずい意い

noun

involuntary

Used in medical, biological, or formal contexts to describe actions or movements that occur without conscious control, such as reflexes or autonomic functions. Often contrasted with 随意 (voluntary).

• 不ふ随ずい意い運うん動どうは、自じ分ぶんの意い思しとは関かん係けいなく起おこる。

  Involuntary movements occur regardless of one's will.

• 心しん臓ぞうの拍はく動どうは不ふ随ずい意いの働はたらきだ。

  The heartbeat is an involuntary function.