dreadful, a.1Imeaglach, uamhnach, uafásach. 2Uafásach, millteach, tubaisteach. It is something dreadful, is uafásach an scéal é. It was a dreadful day, ba chaillte an lá é. S.a. PENNY DREADFUL. ►dreadfully, adv.1Go huafásach. 2F: (Intensive) Dreadfully ugly, millteach gránna. I am dreadfully sorry, tá aiféala an domhain orm. He was dreadfully clumsy, bhí sé thar a bheith ciotach.