Mastitides is the plural form of mastitis, which is an inflammation of the breast tissue. Its spelling is tricky due to the Latin origin of the word, which causes confusion in its pronunciation. The IPA phonetic transcription of this word is /ˌmæstɪˈtaɪdiːz/, wherein the stress falls on the second syllable. The plural ending "-es" is pronounced as /-i:z/ and the "ti" sound is represented by the Greek letter "tau" because it originates from the Greek word "mastós" which means breast.