sich kümmern mind; be worried; care; take care of; be concerned
sich kümmern um look after; care for; bother about; worry about; take care of
sich um anderer Leute Angelegenheiten kümmern stick one's nose in other people's business; pry in other people's business; meddle with other people's business; nose into other people's business
sich um seine eigenen Sachen kümmern mind one's own business