sinusitis

the word 'sinusitis' is a modern medical compound formed from two classical elements. the first part, 'sinus', is a latin word originally meaning 'curve, fold, or hollow', which was adopted into anatomical terminology to describe the hollow cavities in the skull connected to the nasal passages. the second part, '-itis', is a suffix borrowed from greek (via new latin) that specifically denotes inflammation or disease of an organ or body part. the combination follows a clear medical naming convention, where the name of an anatomical structure is paired with '-itis' to precisely indicate an inflammatory condition affecting that location, thus creating the term for inflammation of the sinus cavities.

Structure: sinus + itis sinus (latin, meaning 'curve, fold, hollow') + itis (modern latin/greek, suffix meaning 'disease or inflammation of')