act,
move behave in a certain manner; show a certain behavior; conduct or comport oneself; "You should act like an adult"; "Don't behave like a fool"; "What makes her do this way?"; "The dog acts ferocious, but he is really afraid of people"
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.
OmegaWiki Dictionary
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counteract To destroy property or hinder normal operations.
counteract To make inactive or ineffective; to oppose and mitigate the effects of by contrary actions.