Note 35 — Chapter VII · Triumphs of the Water-world
Reading edition
I regard nid kywiw as a corruption of ni chywiw from cyf-yw, an instance of the verb corresponding to cymod (= cym-bod), ‘peace, conciliation.’ The preterite has, in the Oxford Bruts, A.D. 1217 (p. 358), been printed kynni for what one may read kymu: the words would then be y kymu reinald y breỽys ar brenhin, ‘that Reginald de Breos was reconciled with the king, or settled matters with him.’ ↑