復發

to recur (of a disease) / to reappear / to relapse (into a former bad state)

to go and return / to return / to resume / to return to a normal or original state / to repeat / again / to recover / to restore / to turn over / to reply / to answer / to reply to a letter / to retaliate / to carry out

to send out / to show (one's feeling) / to issue / to develop / to make a bundle of money / classifier for gunshots (rounds)

old illness recurs (idiom); a relapse / fig. to repeat an old error / the same old problem