IPA: /ɪɡˈzænθəm/
KK: /ɛkˈsænθəm/
A widespread rash that often appears on the skin, usually seen in children, often as a symptom of an illness.
The doctor diagnosed the child with an exanthem after noticing the rash on his body.
Exanthem is formed from "ex-" (meaning out) and "anthema" (from Greek "ἀνθέμα", meaning flower or eruption). The word describes a rash or eruption that appears on the skin, resembling flowers blooming out on the surface.
Think of a rash that 'blooms out' ('ex-') on the skin like flowers ('anthema'). This helps you remember that an exanthem is a skin eruption.