دندن

Etymology
From the root.

Verb

 * 1) to hum
 * لا أعرف كلمات الأغنيَة, فأدندن.
 * lā ʾaʿrifu kalimāti l-ʾuğniyati, fa-ʾudandinu.
 * I don't know the lyrics of the song, so I hum.

Noun

 * 1) tooth