Synonyms of pessimistic

1 Syllable

glum, bleak, dark, sad

2 Syllables

troublous, sullen, saddest, beatdown, troubled, tristful, worrying, forlorn, naysaying, coner, morbid, sadder, worried, broody, beat-down, gloomy

3 Syllables

despondent, disturbing, perturbing, cynical, dissentient, morose, unsettling, resigned, upsetting, dejected, come-apart, despairing, distrustful, downhearted, hopeless, down-in-mouth, depressed

4 Syllables

ironical, negative, misanthropic, fatalistic, melancholic, tenebrific, privative, melancholy, foreboding, discouraged

6 Syllables

unaffirmative