放射治療

radiotherapy

to put / to place / to release / to free / to let go / to let out / to set off (fireworks)

to radiate / radioactive

old variant of 射[she4]

to shoot / to launch / to allude to / radio- (chemistry)

to rule / to govern / to manage / to control / to harness (a river) / to treat (a disease) / to wipe out (a pest) / to punish / to research

to treat (an illness) / medical treatment / therapy

to treat / to cure / therapy