Ad, a. a going on, over, or to. It is a general prefix to words answering to RE
Adaddawiad, n. a promising again
Adaddewid, n. a second promise
Adaddo, v. to promise again
Adaerwch, n. importunity
Adafael, n. a distraint
Adafaeliad, n. a distraining
Adafaelu, v. to attach, to seize
Adail, n. a building
Adain, n. a wing; a bird