IPA: /mæˈstaɪtɪs/
KK: /mæ'staɪtɪs/
A condition where the breast or udder becomes swollen and painful, often due to an infection.
The veterinarian diagnosed the cow with mastitis after noticing swelling in her udder.
Mastitis is formed from "masto-" (from Greek "mastos", meaning breast) and "-itis" (from Greek "itis", meaning inflammation). The word refers to the inflammation of the breast tissue.
Think of 'masto-' which relates to the breast and '-itis' which indicates inflammation — so mastitis means inflammation of the breast.