IPA: /nɒn.kənˈkɜːr.ɪŋ/
KK: /nɑnˈkɒŋkərɪŋ/
Not agreeing or having a different opinion.
The committee had a nonconcurring view on the proposed changes.
Nonconcurring → It is formed from "non-" (meaning not) and "concurring" (from Latin "concurrere", meaning to run together or agree). The word "nonconcurring" means not agreeing or not running together in opinion or decision.
Think of 'not' ('non-') agreeing or 'running together' ('concurring') — that's why nonconcurring means not in agreement.