emaciated

(verb) cause to grow thin or weak. Synonyms: waste, emaciate, macerate. Example: "The treatment emaciated him."

(verb) grow weak and thin or waste away physically. Synonyms: emaciate. Example: "She emaciated during the chemotherapy."

(adj) very thin especially from disease or hunger or cold. Synonyms: bony, cadaverous, gaunt, haggard, pinched, skeletal, wasted. Examples: "Emaciated bony hands." "A nightmare population of gaunt men and skeletal boys." "Eyes were haggard and cavernous." "Small pinched faces." "Kept life in his wasted frame only by grim concentration."