pessimistic
US /ˌpes.əˈmɪs.tɪk/
UK /ˌpes.əˈmɪs.tɪk/

1.
pesimista
tending to see the worst aspect of things or believe that the worst will happen
:
•
He has a very pessimistic outlook on life.
Tiene una perspectiva muy pesimista de la vida.
•
Don't be so pessimistic; things will get better.
No seas tan pesimista; las cosas mejorarán.