The word "martyress" is not a commonly used term in English. However, if we were to analyze its spelling using IPA phonetic transcription, we would see that it is made up of two elements: "martyr" and "-ess." The first syllable "mart-" is pronounced /ˈmɑːrtər/, while the suffix "-ess" added to indicate a female version of the noun is pronounced /ɛs/. This combination gives us /ˈmɑːrtərɪs/, which is the correct spelling of "martyress."
The word "martyress" is derived from the word "martyr", which originates from the Greek word "martys" (μάρτυς). In Greek, "martys" means "witness". With the addition of the suffix "-ess", which is used to denote female gender, the term "martyress" refers to a female martyr, specifically a woman who dies for her faith or beliefs.