Pessimist
Pessimist , noun
[Latin pessimus worst: compare French pessimiste.]
1.
(Metaphysics) One who advocates the doctrine of pessimism; -- opposed to optimist.
2.
One who looks on the dark side of things.
Pessimist , adjective
(Metaphysics) Of or pertaining to pessimism; characterized by pessimism; gloomy; foreboding.
Giving utterance to pessimistic doubt.
Also: Pessimistic