coun·ter·act /ˌkaʊntəˈrækt/ 及物動詞
Coun·ter·act v. t. [imp. & p. p. Counteracted; p. pr. & vb. n. Counteracting.] To act in opposition to; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.
v 1: act in opposition to [syn: antagonize, antagonise]
2: oppose or check by a counteraction [syn: countercheck]
3: oppose and mitigate the effects of by contrary actions;
"This will counteract the foolish actions of my
colleagues" [syn: countervail, neutralize, counterbalance]
4: destroy property or hinder normal operations; "The
Resistance sabotaged railroad operations during the war"
[syn: sabotage, undermine, countermine, subvert, weaken]