In a way that doesn't make sense or isn't logically connected; speaking or expressing ideas in a confused or disorganized manner.
From 'incoherent,' combining the prefix 'in-' (not) with 'coherent' (from Latin 'cohaerere' meaning 'to stick together'). The adverbial suffix '-ly' converts it to how an action happens.
The root 'cohere' literally means to stick together, so incoherent speech is ideas that refuse to stick or connect—it's like mental Velcro that's lost its grip!
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