Dyfrbwysiant, n. hydrostatics
Dyfrefu, v. to bleat
Dyfrfydrai, n. hydrometer
Dyfrgi, n. an otter
Dyfrglwyf, n. the dropsy
Dyfrhynt, n. water-course
Dyfriad, n. watering; irrigation
Dyfriar, n. water-hen, coot
Dyfrbigo, v. to top, to prune
Dyfrïo, v. to dignify