Added 9 October 2026 pessimistic /ˌpɛ.səˈmɪs.tɪk/ adjective Categories: Describing WordsUncommon Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about pessimistic at Wordnik → Where our words come from → Expecting the worst possible outcome. Related Words: discourageddisheartenedbearishdemoralizedgrimgloomysombrepassivebleaknegativeoptimisticdramatic Back to today's word