afflicted, disease, suffer from, be ill
患 centers on being burdened by something harmful: afflicted by disease, suffering from illness, or being in a state of ill health.
患 combines 串 (a skewer or something piercing) with 心 (heart), suggesting a heart pierced by worry or illness. The modern form preserves this idea of affliction.
The top part 串 looks like a skewer piercing through something, and the bottom is 心 (heart). Imagine a heart being pierced by a skewer of sickness, causing suffering and disease.
For カン, picture a can of medicine that you desperately need when afflicted by illness: can -> カン, and the medicine soothes the pierced heart.
patient
disease; illness; disorder; condition; ailment
to be ill; to suffer from
contraction of a disease
affected part; diseased part; wound
emergency case
external pressure; foreign threat
(an) epileptic; person with epilepsy
leper; leprosy sufferer
allergic disease
viral disease
leper
human disease model (e.g. using experimental animals)
mouse model for human disease
drug addict
paranoid (person)
congenital heart disease
in-patient
systemic disease; systemic disorder
systemic disease; systemic disorder