shut-in

(noun) someone who is incapacitated by a chronic illness or injury. Synonyms: invalid.

(verb) surround completely. Synonyms: enclose, close in, inclose, shut in. Examples: "Darkness enclosed him." "They closed in the porch with a fence."

(adj) somewhat introverted. Synonyms: introvertish.

(adj) confined usually by illness. Synonyms: homebound, housebound.