Diffeithder, n. foulness
Diffeithfa, n. foul ground
Diffiethiad, n. a laying waste
Diffeithio, v. to lay waste
Diffeithwch, n. a wilderness
Differ, n. defence, guard
Differiol, a. defensive
Differu, v. to defend, to guard
Differyd, v. to defend, to ward
Difflais, a. not ravaged