na-adjective, noun which may take the genitive case particle 'no'
Describes a person, behavior, or atmosphere that is sexually unrestrained or depraved. Strongly negative and often used in formal or literary contexts.
彼は淫乱な生活を送っていた。
He led a debauched life.
その小説には淫乱な描写が多く含
The novel contains many lewd descriptions.
好色 is a more neutral or literary term for 'lustful' or 'sensual', while 淫乱 implies a stronger sense of depravity and lack of restraint.
猥褻 focuses on obscenity or indecency, often in a legal or public-morals context, whereas 淫乱 describes a person's character or behavior as lecherous and debauched.
Composed of 淫 (いん, 'lewd', 'licentious') and 乱 (らん, 'disorder', 'confusion'). The combination conveys a sense of sexual disorder or depravity.