uncoherent
/ʌnˈkɔhɛrənt/Definitions
1. adjective
lacking coherence or logical connection
“The professor’s uncoherent lecture left the students confused.”
2. noun
a state or instance of being uncoherent
“The uncoherence of the argument was evident to everyone.”
3. verb
to make something uncoherent
“The politician’s uncoherent response to the question damaged their credibility.”