I'd personally go with "maul," but "abuse" works too
maltreatment, damage, injury, hurt, harm, exploitation, ill-treatment, manhandling
amputation
It depends on the context. One of the boys was badly hurt but one of the boy's arm was badly hurt.
yes very badly
army men can get that badly hurt that it causes sudden death or survire suffering
no not unless you treat it badly then it will hurt you
doesnt hurt at all.
Badly
injured or wounded
Hurt you, hurt you badly.
present, hurt: They always hurt me. past, hurt: I hurt my knee yesterday. past participle, hurt: She has hurt her knee badly.