The Collaborative International Dictionary
Counteract \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.
Wiktionary
vb. (en-past of: counteract)
Usage examples of "counteracted".
Without waiting her reply, he proceeded to inform her, that the Marquis had, by some inexplicable means, learned or suspected the subject of their last conversation, and, perceiving his designs were in danger of being counteracted, had taken effectual means to prevent her obtaining farther intelligence of them.
I now looked forward to the evening which would bring me again to your presence with increased impatience: but the ingenuity of the Marquis effectually counteracted my endeavours and wishes.
The physician and surgeon, neither of whom he would dismiss, nor suffer to leave the village, proceeded upon contrary principles, and the good effect of what the one prescribed, was frequently counteracted by the injudicious treatment of the other.
She had never seen a place for which nature had done more, or where natural beauty had been so little counteracted by an awkward taste.
The baron's wrath was somewhat counteracted by the reflection that his daughter's good spirits seemed to show that they would naturally rise triumphant over all disappointments.
In this case the abnormal predominance of the quality 'dry' can be counteracted by the medical application of sulphur.
Mivart insists upon, namely, that the chances of many favourable variations being counteracted by other unfavourable ones in the same creature are not inconsiderable.
Doc said, "I prepared a compound that partly counteracted the effects of the grass.
The fewer who knew that it was inactive at night, and that its effect could be counteracted, the better.