This is the 4558th most frequent French word.
martyre
Suffering endured by a martyr, often for their beliefs or cause.
Here, 'martyre' is used as a noun to refer to the suffering or sacrifice endured by early Christians.
Le martyre des premiers chrétiens est bien connu.
The martyrdom of the early Christians is well known.
In this sentence, 'martyre' refers to an individual (female form) who suffers or dies for their beliefs.
Elle est considérée comme une martyre pour sa foi.
She is considered a martyr for her faith.
This usage of 'martyre' again is as a noun, emphasizing the personal suffering or sacrifice with an abstract perspective.