noun, noun or participle which takes 'suru', intransitive verb
decomposition; putrefaction; decay
Refers to the process of organic matter rotting and breaking down, often with a sense of disorderly decay. Can be used literally for corpses or figuratively for moral/social decay.
遺体はすでに腐乱が進んでいた。
The body had already advanced in decomposition.
腐乱
A decomposed corpse was found in the river.