Naysayer
(noun)
- A person who objects to a proposal or plan and predicts its failure.
- A person who denies the validity or feasibility of an idea or suggestion.
- A person who takes a negative or critical attitude towards something.
Origin:
Late 19th century: from nay + sayer.
Examples:
- The project was opposed by many naysayers who thought it would never succeed.
- Despite being a naysayer, he reluctantly agreed to participate in the experiment.
- The proposal was met with criticism from the usual naysayers who thought it was too risky.
- Her optimism was undaunted by the naysayers who told her she would never make it.
- The naysayers were proven wrong when the project turned out to be a huge success.