to fall ill; to be taken ill
to contract a disease; to get sick; to become ill
get-well card (gift, letter); visit to a sick person; inquiry after a sick person
proneness to being ill; being sick a lot; proneness to disease
mental illness; emotional disorder
feigning illness; pretending to be ill
bowel disease; intestinal disorder; bowel ailment
sick leave; paid sick days
under the pretext of ill health
sick leave; sickness leave