cynghanedd
The complex system of internal assonance, alliteration and rhyme in Welsh strict-meter poetry.
uncountable
Only certain epithets and metaphors were authorized; themes were similarly restricted, metres fixed, and Cynghanedd, the repetitive use of consonantal sequences with variation of vowels, became a burdensome obsession.
Where it comes from
Borrowed from Welsh cynghanedd (“harmony”).
Adapted from the Wiktionary entry cynghanedd (CC BY-SA 4.0).