Radif
In Persian, Turkic, and Urdu ghazals, the radīf is the word which must end each line of the first couplet and the second line of all the following couplets. It is preceded by a qafiya, which is the actual rhyme of the ghazal.
The following is an example of an Urdu ghazal by Daagh Dehlvi, where the radif is "mein" while the qafiya is in -aah:,,,, and.
In Urdu, a ghazal which has no radif is known as ghair muraddaf ghazal; if it contains radif, it is called a muraddaf ghazal.