Diffrwyth, a. fruitless; feeble
Diffrwytho, v. to make abortive
Diffryd, v. to protect
Diffuant, a. unfeigned
Diffur, a. without perception
Diffwyn, n. defence, guard
Diffwys, n. a precipice
Diffydd, a. faithless, infidel
Diffyg, n. defect, failure. Diffyg yr haul, an eclipse of the sun. Diffyg anadl, shortness of breath
Diffygiad, n. defection