All 3 Uses of

fervor
in
The Magic Mountain

"I have to know!" he whispered with exaggerated fervor, so that both Miss Robinson and the teacher glanced at him in amazement.†
Chpt 3.7 *

fervor = intense feelings

After that, he threw himself with redoubled fervor into the arms of the clear-eyed goddess, about whose soothing powers Director Behrens had so many virtuous things to say; and the problem that consumed his every thought day and night, to which he devoted all the persistence, all the sportsman's tenacity he had once brought to the conviction of poor sinners—back in the days before his frequently extended leave of absence, which now threatened to become permanent retirement—that problem was nothing less than the squaring of the circle.†
Chpt 7.6

"My being is yours," he sang in desperation, repeating the same anguished melodic phrase, which the orchestra also picked up again on its own, ascending two notes up from the dominant and with deepest fervor moving back to the fifth below.†
Chpt 7.7