catch, get
罹 centers on being affected by something undesirable: catching an illness or getting into a difficult situation.
罹 combines 罒 (net) with 惟, which likely contributes the sound. The idea of being caught in a net extends to catching an illness or misfortune.
The top 罒 looks like a net, and the bottom 惟 suggests a heart 忄 caught with a bird 隹. Imagine a net trapping your heart, like catching a cold that weighs you down.
For リ, picture a net catching a leek (リーキ): the leek sound cues リ, and the net catches it just like you catch an illness.
contraction of a disease
to contract (a disease); to suffer from
suffering (from a calamity); affliction
disease rate; infection rate; morbidity rate
person affected by a disease; sufferer
victims; sufferers
person affected by a disaster; afflicted person; victim; sufferer; survivor
contraction of a disease; morbidity
disease rate; infection rate; morbidity rate