Synonyms for Dispirited (same or very similar meaning)
WordNet sense 1 (marked by low spirits; showing no enthusiasm):
listlessWordNet sense 2 (lacking ardor or vigor or energy):
spiritlessWordNet sense 3 (low in spirits):
blue, depressed, down, downcast, downhearted, low, low-spirited, down in the mouthWordNet sense 4 (affected or marked by low spirits):
dejectedFrom the ODE community, based on WordNetadd/edit