( v. t. )
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. t. )
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's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012