To reduce the strength or effectiveness of:削弱：削减了…的力量或效力："It seemed clear by late autumn that the ban would be significantly watered down or removed altogether before the trade bill became law"(George R. Packard)“到晚秋时，这项禁令看起来会被大大削弱或在贸易法案成为法律之前完全撤销”(乔治R.帕卡德)