Rubaʿi the convention is sometimes extended so that the unrhymed line of the current stanza becomes the rhyme for the following stanza. The structure can be made cyclical by linking the unrhymed line of the final stanza back to the first stanza: ZZAZ. These more stringent systems were not, however, used by FitzGerald in his "Rubaiyat". Rubaʿi Rubāʿī (from "rubāʿiyy", plural "rubāʿiyāt") is the term for a quatrain, a poem or a verse of a poem consisting of four lines. It refers specifically to a form of Persian poetry, or its derivative form in English and other languages In classical Persian
Decasyllabic quatrain decasyllabic quatrain contains a stiffness that can not be overcome: You can not vary your stops, as in blank verse or the Spenserian, there is not room enough: and the recurrent divisions necessatated by the stanza lack at once the conciseness and the continuity of the couplet, the variety and amplitude of the rhyme-royal, octave, or Spenserian itself. In his essay on "Annus Mirabilis", A. W. Ward suggests that the decasyllabic quatrain used by Davenant and Dryden, with its insistence on providing each quatrain with the "completeness" given by the final period, causes the verse to strike the reader as