Definitions for: Counteract

[v] destroy property or hinder normal operations; "The Resistance sabotaged railroad operations during the war"
[v] oppose and mitigate the effects of by contrary actions; "This will counteract the foolish actions of my colleagues"
[v] act in opposition to
[v] oppose or check by a counteraction

Webster (1913) Definition: Coun`ter*act" (koun`t?r-?kt"), 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.

Synonyms: antagonise, antagonize, counterbalance, countercheck, countermine, countervail, neutralize, sabotage, subvert, undermine, weaken

See Also: act, cancel, check, contain, control, curb, derail, disobey, hold, hold in, moderate, move, offset, override, set off

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