Vatsun is derived from Sanskrit ‘Vachan’ meaning word/speech. This is because it has no particular pattern of versification or rhyme scheme. The metres and rhyme schemes of vatsun are varied, but generally each unit is a stanza of three lines followed by a refrain (vooj). Vatsun bears a resemblance to Urdu lyric

Urdu

Urdu is a register of the Hindustani language that is identified with Muslims in South Asia. It belongs to the Indo-European family. Urdu is the national language and lingua franca of Pakistan. It is also widely spoken in some regions of India, where it is one of the 22 scheduled languages and an...

. Vatsun is also similar to the ghazals

Ghazal

The ghazal is a poetic form consisting of rhyming couplets and a refrain, with each line sharing the same meter. A ghazal may be understood as a poetic expression of both the pain of loss or separation and the beauty of love in spite of that pain. The form is ancient, originating in 6th century...

 of the Middle East and iambic pentameter

Iambic pentameter

Iambic pentameter is a commonly used metrical line in traditional verse and verse drama. The term describes the particular rhythm that the words establish in that line. That rhythm is measured in small groups of syllables; these small groups of syllables are called "feet"...

 of the Western world.