IPA: //nɒn.kənˈsɛn.ʃu.əl//
KK: /nɑnˈkɒnsɛnʃuəl/
Describing an action that is done without the agreement or permission of the people involved.
The incident was classified as nonconsensual, leading to serious legal consequences.
Nonconsensual → It is formed from "non-" (meaning not) and "consensual" (from Latin "consensualis", meaning of agreement or consent). The word "nonconsensual" means not based on agreement or consent.
Think of 'not' ('non-') agreeing ('consensual') — that's why nonconsensual means something that is done without agreement.