All 4 Uses of

emaciated
in
The Magic Mountain

Barely twenty years old, but already graying and balding, the patient was emaciated, his skin waxen; he had large hands, large ears, a large nose; grateful to the point of tears for this diversion and their encouraging words, he actually wept a little out of weakness as he greeted them and accepted the bouquet.†
Chpt 5.8

emaciated = unhealthfully thin

He thought and said things that caused his sickly mother to tilt her head, raise her shoulders, and fling her emaciated hands in the air.†
Chpt 6.6 *

Joachim grasped Frau Ziemssen's hand with hands that were as yellow and wasted as his emaciated face, from which his ears, the one minor sorrow of his youth, stuck out more than ever; but despite that regrettable disfigurement, suffering had stamped his face with an expression of austere earnestness, even pride, and he still looked very manly—although the lips beneath his dark little moustache seemed too full now against the shadows of his hollow cheeks.†
Chpt 6.8

Although whatever that was on his head cast a long shadow, his emaciated face visibly bore the stamp of suffering and the same austere, earnest expression that had made him look so manly.†
Chpt 7.8

Definition:

very thin -- especially from disease or hunger or cold