All 8 Uses of

stupor
in
The Magic Mountain

Grotesque images of horror and torment straight out of Dante: naked madmen living their lives squatting in tubs of water, in every pose of mental anguish and terrified stupor, some screaming aloud in lament, others with arms raised and mouths gaping as they burst with laughter—all the ingredients of hell merged in one.†
Chpt 6.6

stupor = a state in which there is little ability to think

It will be said that the narrator is laying it on too thick, being too romantic in associating stupor with demonic forces, even ascribing to it some sort of mystic horror.†
Chpt 7.6

And yet we are not fabricating tales here, but are keeping exactly to our prosaic hero's personal experience— knowledge of which has been granted to us in ways that, to be sure, elude all investigation, but that plainly prove that under certain circumstances stupor can take on such character and instill such feelings.†
Chpt 7.6

"Your eyes," his mentor said, "try in vain to conceal that you know "Placet experiri," Hans Castorp had the impudence to reply, and Herr Settembrini departed—and then, to be sure, once left to his own devices, the young man did not lay out his cards again, but sat for a long time at the table in his white room, his head propped in his hand, brooding, gripped by the horror of the eerie and skewed state in which he saw the world entrapped, by the fear of the grinning demon and monkey-god in whose crazed and unrestrained power he now found himself—and whose name was "The Great Stupor."†
Chpt 7.6

With appropriately lowered voice, we shall say that the thunderbolt itself (with which we are all familiar) was the deafening detonation of great destructive masses of accumulated stupor and petulance.†
Chpt 7.10

Definition:

a state in which there is little ability to think -- as from being very sleepy, drunk, or stunned