sad; miserable; wretched

Why is she so unhappy?

unfortunate; unlucky

an unhappy incident.

unfavorable; inauspicious

an unhappy omen.

infelicitous; unsuitable

an unhappy choice of words.

Archaic . causing trouble; reprehensible; troublesome.

noun

blues , dejection , depression , despondence , despondency , doldrums , dolefulness , downheartedness , dumps , dysphoria , funk , glumness , heavy-heartedness , melancholy , mope , mournfulness , sadness , anhedonia , distress , dolor , grief , heartache , infelicity , misery , misfortune , sorrow , woe , worry , wretchedness

adjective

alienated , anhedonic , antagonized , disconsolate , disgruntled , dismayed , disquieted , dysphoric , estranged , inept , infelicitous , melancholy , miserable , mournful , unfortunate , unhappy , wretched

verb

bemoan , lament , repine , rue