Dydoliad, n. a segregating
Dydoliaeth, n. segregation
Dydolwr, n. separator, a divider
Dydoni, v. to pare a surface
Dydori, v. to break
Dydreiddio, v. to penetrate
Dydrëu, v. to bore, to pierce
Dydrwyno, v. to follow a scent
Dydwyllo, v. to deceive
Dydwytho, v. to make elastic