不ふ随ずい意い筋きん

ふ

ず

い

き

ん

Meanings

1

noun

involuntary muscles

Medical term for muscles not under conscious control, such as the heart and smooth muscles.

negative, non-, bad

随follow, though, notwithstanding

意idea, mind, heart

筋muscle, sinew, tendon

随ずい意い筋きん
Refers to voluntary muscles that can be consciously controlled, such as skeletal muscles.

Compound of 不 (fu, 'not') + 随意 (zuii, 'voluntary') + 筋 (kin, 'muscle'). A straightforward medical term.