Extraordinarily good or great; used especially as an intensifier - fantastic, grand, howling, marvelous [US], marvellous [Brit, Cdn], rattling, terrific, tremendous, wonderful
Adverb: wondrouswúndrus
(used as an intensifier) extremely well - wonderfully, wondrously, superbly, toppingly, marvellously [Brit, Cdn], terrifically, marvelously [US]