IPA: /ˌɪn.kəʊˈhɪə.rəns/
KK: /ɪnkoʊˈhɪrəns/
The state or quality of being unclear or difficult to understand, often due to a lack of logical connection or organization.
The incoherence of his argument made it hard to follow his point.
Incoherence → It is formed from "in-" (meaning not) and "coherent" (from Latin "cohaerentem", meaning sticking together or being consistent). The word "incoherence" means a lack of consistency or logical connection, indicating that something does not stick together logically.
Think of 'not' ('in-') being combined with 'sticking together' ('coherent') — that's why incoherence means a lack of logical connection.