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Webster 1913 Edition

Counteract

Counˊter-act′

(kounˊt?r-?kt′)
,
Verb.
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
.

Webster 1828 Edition

Counteract

COUNTERACT

,
Verb.
T.
[counter and act.] To act in opposition to; to hinder, defeat or frustrate by contrary agency. Good precepts will sometimes counteract the effects of evil example; but more generally good precepts are counteracted by bad examples.

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