watered-down
adjective [ before noun ] uk/ˌwɔː.tədˈdaʊn/ us/ˌwɑː.t̬ɚdˈdaʊn/
（意见或观点）减弱了的，减轻了的，降低了的
A watered-down idea or opinion has been made less extreme than it originally was, usually so that people are more likely to accept it.
They have returned with a watered-down version of the proposal. 他们送回了一份弱化过的计划书。