verb(past and past participle naysaid)[with object]chieflyUS
Say no to; deny or oppose:I’m not going to naysay anything he does...
The auto industry loves the federal handout, and environmentalists have a hard time naysaying any plan that encourages hydrogen, since they heartily endorse the technology too.
He's is pretty much naysaying the strategic importance of the IT sector.
From what I hear most of the usual naysaying pundits are rather hopeful about him.
Derivatives
naysayer
/ˈneɪˌseɪə /noun...
And the naysayers, once exposed to my blog, can't resist the urge to rant and fume about me in posts on their own blogs.
A few naysayers like to disparage our system of mass communications.
This is a significant step, and don't let naysayers tell you otherwise.