Ardderchedd, n. excellence
Ardderchog, a. excellent, exalted
Ardderchogi, v. to dignify
Arddiad, n. a ploughing
Arddigon, n. superfluity
Arddigoni, v. to make an excess
Arddigonol, a. superabundant
Arddisgyn, v. to befall, to happen
Arddisum, a. diminutive
Arddodi, v. to prefix, to annex