adjective

(of a person) lean and haggard, especially because of suffering, hunger, or age.

a tall, gaunt woman in black

haggard,drawn,cadaverous,skeletal,emaciated,skin-and-bones,skinny,spindly,thin,over-thin,size-zero,spare,bony,angular,lank,lean,raw-boned,pinched,hollow-cheeked,hollow-eyed,lantern-jawed,scrawny,scraggy,shrivelled,wasted,withered,raddled,as thin as a rake,as thin as a reed,without an ounce of fat,looking like death warmed up,looking like a bag of bones,spindle-shanked,starveling