-itis
/ˈaɪtɪs/suffix
1- forming names of inflammatory diseases构成炎症的名称：
cystitis
hepatitis.
1.1
- informal used with reference to a tendency or state of mind that is compared to a disease（非正式）表示“有…病态”, “有…癖”：
creditcarditis.
词源
from Greek feminine form of adjectives ending in -itēs （combined with nosos 'disease' implied）.