The adjective ' auspicious ' has its etymological origins in Latin. It is derived from the Latin word 'auspex,' which was formed from 'avis' (bird) and 'specere' (to look at or observe). In ancient Rome, an 'auspex' was a religious official who observed and interpreted the flight patterns of birds to determine whether a particular action or event was favored by the gods. The belief was that the behavior of birds could provide guidance and reveal whether a course of action was likely to be ... Synonyms for AUSPICIOUS : promising, bright, optimistic, propitious, hopeful, golden, rosy, encouraging; Antonyms of AUSPICIOUS : inauspicious, unlikely, dark ... Use the adjective auspicious for a favorable situation or set of conditions. If you start a marathon by falling flat on your face, that's not an auspicious start. Define auspicious . auspicious synonyms, auspicious pronunciation, auspicious translation, English dictionary definition of auspicious . adj. Presenting favorable circumstances or showing signs of a favorable outcome; propitious: an auspicious time to ask for a raise. aus·pi′cious·ly adv....