coun·ter·act /ˌkaʊntərˈækt/ ●○○ verb [transitiveT] SOLVE/DEAL WITH A PROBLEMto reduce or prevent the bad effect of something, by doing something that has the opposite effect 抵消;对抗 They gave him drugs to counteract his withdrawal symptoms. 他们给他服药以消除他的脱瘾症状。
—counteraction /-ˈækʃən/ noun [countableC, uncountableU]