Definition of Disgruntled:

unhappy; critical

Synonyms of Disgruntled:

testy, annoyed, irritated, discontent, displeased, peeved, disappointed, dissatisfied, discontented, crabby, cranky, grouchy, grumpy, irritable, malcontent, peevish, petulant, put out, sulky, sullen, griping, grousing, vexed, kvetching, bellyaching, , , bad tempered, malcontented, uncontent, ungratified

Opposite/Antonyms of Disgruntled:

happy, uncritical, contented, satisfied, pleased

Sentence/Example of Disgruntled: