1. 分裂：disassimilation 异化作用 | disassociation 分裂 | disaster 灾难

2. 分解：disassimilation 异化 | disassociation 分解 | disaster clean-up operation 灾害清理作业

3. 分离：disassociate 分离 | disassociation 分离 | disaster area 灾区

noun

1. a state in which some integrated part of a person's life becomes separated from the rest of the personality and functions independently

Synonym: dissociation

2. the state of being unconnected in memory or imagination

e.g. I could not think of him in disassociation from his wife