It is derived from the Greek word οδύνη (odyne), which also means pain.
Here are some examples of words using the combining form odyn-:
* Odynophagia: Painful swallowing
* Odynophobia: Fear of pain
* Odynodynia: Pain in pain (a feeling of intense pain)
Remember, combining forms are often used in medical terminology to create new words and describe specific medical conditions.