Dyferiad, n. a dropping
Dyferiog, a. dropping; leaky
Dyferu, v. to drop, to drizzle
Dyferwad, n. ebullition
Dyferwi, v. to boil
Dyferyn, n. a single drop
Dyferynu, v. to drizzle
Dyfeth, n. failing; nullity
Dyfetha, v. to destroy
Dyfethiad, n. a destroying