Cywydd

The cywydd (IPA: [ˈkəwɨ̞ð]; plural cywyddau) is one of the most important metrical forms in traditional Welsh poetry (cerdd dafod).

There are a variety of forms of the cywydd, but the word on its own is generally used to refer to the cywydd deuair hirion ("long-lined couplet") as it is by far the most common type.

The first recorded examples of the cywydd date from the early 14th century, when it is believed to have been developed.

This was the favourite metre of the Poets of the Nobility from the 14th to 17th centuries and is still used in the 21st.

The cywydd deuair hirion and the related cywydd deuair fyrion, cywydd llosgyrnog and the awdl-gywydd all occur in the list of the twenty four traditional Welsh poetic meters adopted in the later Middle Ages.