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"
extemporize,
improvise perform without preparation; "he extemporized a speech at the wedding"
fend try to manage without help; "The youngsters had to fend for themselves after their parents died"
hack,
cut cough spasmodically; "The patient with emphysema is hacking all day"
