A thousand incoherent ideas swirled around my mind.

The ramblings are incoherent words from someone who is sick or depressed, that he mumbles while awake.

Sami appeared to be pretty incoherent.

Ziri was incoherent.

The foreigner answered with a long, incoherent sentence.

When Yanni is drunk, he's an incoherent mess.

Tom's message was incoherent.

That person's accent is incoherent to me.

Tom's uncle is always going off on incoherent rants about participation trophies.

Without the knowledge we have today about viruses, the medical response to the 1793 contagion, one of a series that swept 18th and 19th century America prompting the Yellow Fever to be nicknamed "the American Plague," was incoherent and ineffective.