Rhybuch, n. earnest longing
Rhybudd, n. notice, warning
Rhybuddio, v. to give notice
Rhybuddiol, a. warning
Rhyburo, v. to purify fully
Rhybwyso, v. to over-weigh
Rhybwyth, n. a retort; over-play
Rhych, n. a trench, a furrow
Rhychio, Rhychu, v. to trench, to furrow
Rhychwant, n. a span length