noun, noun which may take the genitive case particle 'no'
mental derangement; mental confusion; alienation
A formal, clinical term for a state of severe mental disturbance or confusion, often used in medical or legal contexts.
The defense argued that the crime was committed in a state of mental derangement.
彼は精神錯乱と診断され、入院治療が必要とされた。
He was diagnosed with mental confusion and required hospitalization.