rumorproof
/ˈruːmərpruːf/Definitions
1. adjective
protected or designed to prevent the spread of rumors or false information
“The company’s social media presence was intended to be rumorproof, but a single tweet sparked a media frenzy.”
2. noun
a person or thing that is protected or designed to prevent the spread of rumors or false information
“The rumorproof expert was called in to address the company’s crisis management.”