-itis

(Greek: a suffix; inflammation, burning sensation; by extension, disease associated with inflammation)

This suffix has come to mean "inflammation of" but originally it meant "pertaining to" or "of the". The Greek word nosos ["disease"] was either expressed or understood, although it might not be included with the basic element. For example, bursitis nosos would mean "disease of the bursa".

meningitis (s) (noun), meningitides (pl)
Inflammation of the three membranes that completely cover the brain and the spinal cord: "Meningitis can be caused by the infection of bacteria, viruses, and protozoa (simple, microscopic parasites of humans)."

"Other causes of meningitis include cancer (metastasis a secondary malignant tumor that has spread from a primary cancer to affect the meninges), inflammatory diseases, and drugs. In some cases the cause of meningitis cannot be determined. The medical treatment depends on what causes the meningitis."

meningomyelitis
metritis
myelitis
myeloencephalitis
Inflammation of the spinal cord and the brain.
myocarditis
myositis
myringitis
Inflammation of the eardrum usually as a result of infection.
nephritis
neuritis
neuroretinitis
An inflammation affecting the optic nerve head and the posterior pole of the retina, with cells in the nearby vitreous (glasslike), usually producing a macular (central retina) star.
nymphitis
ohthalmosteresis
The absence, or loss, of one or both eyes.
omphalitis
onychitis
Inflammation of the nail bed, resulting in loss of the nail.