Ng or Naf (ݣ‎ or ڭ‎) is an additional letter of the Arabic script, derived from kāf (ك ک‎) with the addition of three dots above the letter.

The letter was used in Ottoman Turkish to represent a velar /ŋ/ and is still used for /ŋ/ when writing Turkic languages.

The Xiao'erjing script variant ݣ‎ is used to spell /ŋ/ in Sinitic languages such as Mandarin (especially the Lanyin, Zhongyuan and Northeastern dialects) and the Dungan language.

Derived from the Perso-Arabic gāf (گ) and called ngāf [ŋäːf], is used in Sindhi for /ŋ/ when written in the Arabic script.

This letter is also derived from ghayn, with three dots inside the descender, to represent /ŋ/ in the Arwi script used for Tamil.