Both Uses

martyr
in
Tess of the d'Urbervilles
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It was as if people should laugh at martyrdom.†
Chpt 4 *

martyrdom = the death or suffering of someone due to upholding principles
The postilion was a venerable "boy" of sixty—a martyr to rheumatic gout, the result of excessive exposure in youth, counter-acted by strong liquors—who had stood at inn-doors doing nothing for the whole five-and-twenty years that had elapsed since he had no longer been required to ride professionally, as if expecting the old times to come back again.†
Chpt 4

martyr = someone who dies or suffers to uphold principles

Definitions:

(1) (martyr)
someone who is killed or made to suffer greatly for their beliefs, often unjustly; or someone who acts as if they suffer a lot; or to make someone into such a person
(2) (meaning too rare to warrant focus)