Describes a person, outlook, or view that expects the worst or focuses on negative aspects. Often used with ～な and ～になる.
He has a pessimistic view of the future.
You don't have to be so pessimistic.
He is pessimistic about the future.
After a string of failures, he became pessimistic.
Many people take a pessimistic view of the economy.
It's not good to think pessimistically about everything.