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

1.
pessimiste
tending to see the worst aspect of things or believe that the worst will happen
:
•
He has a very pessimistic outlook on life.
Il a une vision très pessimiste de la vie.
•
Don't be so pessimistic; things will get better.
Ne sois pas si pessimiste ; les choses vont s'améliorer.