to make something less severe

to damage something or make something worse

very important, needing immediate attention or action

the system related to organs used for breathing

 the same bad treatment that you have given to others

a piece of paper on which a doctor writes what medicine a sick person should have, so they can get it from a pharmacist

painful and sore

to become ill with a disease

the time between catching a disease and the appearance of the first symptoms

a mass of cells growing in or on a part of the body where they should not, usually causing medical problems