Cynghanedd Groes is a traditional Welsh poetic form characterized by its intricate sound patterns. It involves the use of consonance and assonance, where the end of one line rhymes with the beginning of the next. This creates a musical quality that enhances the poem's emotional impact. In Welsh literature, Cynghanedd Groes is often used in cywydd and englyn forms, showcasing the poet's skill in manipulating language. The structure typically includes a specific number of syllables and a set rhyme scheme, making it a challenging yet rewarding form for poets to master.