pessimist

/ˈpɛsɪmɪst/
noun
  1. A person who tends to see the worst aspect of things or believes that the worst will happen.
    • My uncle is a pessimist who always expects the traffic to be terrible.
    • As a pessimist, she prepared for the exam as if she would fail.
    • Don't be such a pessimist — the weather forecast says it will clear up.
Antonyms
What does "pessimist" mean? | whatsthatwordmean | whatsthatwordmean