VERB
使减轻；使减弱；使削弱
To attenuate something means to reduce it or weaken it.
例句
You could never eliminate risk, but preparation and training could attenuate it...
风险不可能完全消除，但可以通过防范和培训来降低。
Theirs had been an increasingly attenuated relationship.
他们的关系日益冷淡。