[ ney-sey-er ]
/ ˈneɪˌseɪ ər /
a person who habitually expresses negative or pessimistic views: Despite a general feeling that things were going well, a few naysayers tried to cast gloom.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for naysayer
“I agree with the naysayers—in fact, I pretty much am a naysayer,” concludes Noller.Dogecoin, Coinye, & Catcoin: A Dummy’s Guide to Cryptocurrencies|Charlotte Lytton|January 19, 2014|DAILY BEAST
Nowinski admits that the league “went from being a naysayer to a powerful advocate” for the cause.Steve James and Christopher Nowinski Talk the New Doc ‘Head Games’|Kevin Fallon|September 22, 2012|DAILY BEAST