Both Uses of

incensed
in
The Magic Mountain

Still incensed, Hans Castorp asked if that was her husband there, and pointed to a gentleman with hunched shoulders sitting at the Good Russian table.†
Chpt 3.7 *

incensed = very angered

He was also inclined to temper tantrums and had frequently clashed with Herr Wenzel about politics or other matters, for he was incensed by the nationalist aspirations of the Bohemian, who likewise declared himself an advocate of temperance and would sometimes cast moral aspersions on the brewer's profession, whereupon the latter would turn red-faced and defend the incontestable benefits to health found in the beverage with which his interests were so intimately entwined.†
Chpt 6.5

Definitions:

(1) (incensed as in: incensed by her insult)
very angered
(2) (meaning too rare to warrant focus)
meaning too common or too rare to warrant focus:

More commonly, incense refers to something that is slowly burned to create a pleasant smell.