A person who holds a pessimistic view; someone inclined to expect negative outcomes.
彼は経済の将来について悲観論者として知られている。
He is known as a pessimist regarding the future of the economy.
悲観論者の見方も一理あるが、過度に悲観するのは良くない。
There is some merit to the pessimist's perspective, but being overly pessimistic isn't good.
悲観論者はしばしば最悪のケースを想定する。
Pessimists often assume the worst-case scenario.