ichidan verb, intransitive verb
be disordered; be disarranged; be disheveled
Describes physical disorder: hair, clothes, room, order, rhythm, etc. Intransitive counterpart to 乱す.
風で髪が乱れた。
My hair got messed up by the wind.
部屋が乱れているから片付けなさい。
Your room is a mess, so clean it up.
ichidan verb, intransitive verb
be upset; be disturbed; get confused
Describes mental or emotional disturbance: heart, mind, composure, thoughts. Often used with 心, 気持ち, 精神, etc.
突然の知らせに心が乱れた。
My heart was disturbed by the sudden news.
彼は動揺して考えが乱れた。
He was shaken and his thoughts became confused.
ichidan verb, intransitive verb
lapse into chaos; fall into disorder
Used for social or systemic breakdown: public order, discipline, morals, due to war, crisis, etc. Often with 秩序, 風紀, 世の中.
戦争で国の秩序が乱れた。
The country's order collapsed due to the war.
不況で社会の風紀が乱れた。
Public morals declined during the recession.