معنی کلمه :‌ counteract

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.

In a strong manner; so as to be strong in action or in resistance; with strength; with great force; forcibly; powerfully; firmly; vehemently; as, a town strongly fortified; he objected strongly.