negativist

/ˈnɛɡətɪvɪst/
noun
  1. A person who habitually takes a negative or pessimistic view.
    • The negativist in the group always pointed out why plans would fail.
    • She tried to ignore the negativist's complaints and focus on solutions.
    • Don't be such a negativist — there are plenty of reasons to be hopeful.
  2. A person who resists or opposes suggestions, instructions, or authority.
    • The negativist on the team slowed down the project by questioning every decision.
    • In negotiations, a negativist can stall progress by rejecting every offer.
    • The teacher had to find ways to engage the negativist who refused to participate.
Antonyms
What does "negativist" mean? | whatsthatwordmean | whatsthatwordmean