adjective

abnormally thin or weak, especially because of illness or a lack of food.

she was so emaciated she could hardly stand

thin,skeletal,bony,wasted,thin as a rake,scrawny,skinny,scraggy,skin and bones,raw-boned,angular,sticklike,size-zero,starved,underfed,undernourished,underweight,half-starved,cadaverous,shrivelled,shrunken,withered,gaunt,haggard,drawn,pinched,wizened,attenuated,atrophied,anorexic,looking like a bag of bones,phthisical