counteract

As a verb counteract

is to act in opposition to; thwart; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

As an adjective antiulcer is

serving to prevent or counteract ulcers.

As verbs the difference between counteract and countercharm

is that counteract is to act in opposition to; thwart; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice while countercharm is to destroy the effect of a charm upon.

As a noun countercharm is

that which counteracts a charm; a counterspell.

As a verb counteract

is to act in opposition to; thwart; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

As an adjective antibug is

serving to kill or repel bugs (insects).

As a verb counteract

is to act in opposition to; thwart; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

As an adjective antipregnancy is

serving to counteract pregnancy.

As a verb counteract

is to act in opposition to; thwart; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

As an adjective antiriot is

serving to counteract rioting.

As a verb counteract

is to act in opposition to; thwart; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

As an adjective antiacne is

serving to counteract acne.

As a verb counteract

is to act in opposition to; thwart; to hinder, defeat, or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.

As an adjective antimagic is

(rare) opposed to magic or witchcraft.