S: (v) emaciate (grow weak and thin or waste away physically) "She emaciated during the chemotherapy"
Adjective
S: (adj) cadaverous, emaciated, gaunt, haggard, pinched, skeletal, wasted (very thin especially from disease or hunger or cold) "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"