1. a person who habitually expresses negative or pessimistic views
2. a person who tends to oppose or reject suggestions, proposals, or ideas

Examples

• The team’s negativist always found fault with every new proposal.
• She was known as a negativist who rarely saw the bright side of any situation.
• The committee struggled to make progress with such a vocal negativist among its members.
• His reputation as a negativist made colleagues hesitant to share ideas with him.
• The negativist’s constant criticism dampened the group’s enthusiasm.
• Despite being labeled a negativist, she claimed she was just being realistic.