successful, a.Rathúil, buach, éiritheach.It was entirely successful, d'éirigh leis go hiontach. He was successful in founding a business, rith leis gnó a bhunú. He is successful in everything, tá an t-ádh ina rith air. The successful candidates, na hiarrthóirí ar éirigh leo. ►successfully, adv.Go rathúil. He dealt successfully with the task, d'éirigh leis an obair a chur i gcrích go maith.