friend

a sick friend, a friend who is ill / different people who have the same disease (not necessarily friends)

every day; daily

everyday life; daily life

battling an illness; struggling against a disease

to battle an illness; to struggle against a disease

healthy / energetic / in a good mood; peppy; lively

the fundamental force that permeates through all matter and life / health, healthfulness / (personal) energy / good spirits; vitality; cheer; liveliness; enthusiasm

a male given name

a male given name