How to Pronounce Sinus

Sinus is pronounced SY-nus, with the stress on the first syllable. Say it like you're saying "sigh" and then add "nus" at the end: SY (like the letter 'Y') + nus. The word rhymes with "highness" but with a 'nuh' sound at the end instead of 'ness'.

Sinus has two syllables: SI-nus. The first syllable gets the emphasis when you say it.

Many people accidentally stress the second syllable and say sin-US (SIN-us) instead of SY-nus. Remember: the emphasis belongs on the first syllable, like you're starting with a sigh.

A sinus is a hollow, air-filled space inside your skull bones. Think of it like a small cavity or pocket that helps make your skull lighter and gives your voice its resonance when you speak or sing.

Sinus comes from Latin, where it originally meant 'a curve' or 'a fold.' The word was adopted into medical language because these hollow spaces in the skull have curved, recessed shapes.

You'll hear medical professionals use words like 'sinusitis' (which describes inflammation in these spaces) and 'paranasal' (which means 'next to the nose'). The root 'sinus' appears in both, referring to these same skull cavities.

Here's an example: "The doctor explained that the paranasal sinuses are air-filled cavities in the bones around your nose and eyes." This sentence shows how the word is used when discussing skull anatomy.

Getting the pronunciation right helps you communicate clearly with healthcare providers and understand medical conversations. Stressing the first syllable (SY-nus) matches how doctors and nurses say it, so you'll sound confident when discussing anatomy.