Dullwedd, n. style
Duo, v. to blacken; to darken
Dur, n. hard matter; steel
Duraidd, a. of steely nature
Durdeb, n. steeliness; solidity
Duren, n. a steel to strike fire
Durew, n. a black frost
Durf, n. what is dense
Durfin, a. dense, close hard
Durfing, a. dense; austere