Dwywaith, adv. twice
Dy, a pref. denoting, force and iteration: pron. thy, or thine
Dyad, n. effect, efficacy
Dyadel, v. to leave, to suffer
Dyall, n. the understanding; v. to understand, to comprehend
Dyalladwy, a. comprehensible
Dyar, n. a din, noise: v. to make a tumult
Dyarchiad, n. a demanding
Dyaros, v. to be tarrying
Dyban, n. an ant, emmet