IPA: /nɒnˈraɪətɪŋ/
KK: /nɑnˈraɪtɪŋ/
Not participating in a violent public disturbance or riot.
The nonrioting crowd remained peaceful during the protest.
Nonrioting → It is formed from "non-" (meaning not) and "rioting" (from the verb "riot", which comes from Old French *rioter*, meaning to engage in a disturbance or uproar). The word "nonrioting" means not engaging in a disturbance or uproar.
Think of 'not' ('non-') participating in a 'disturbance' ('rioting') — that's what nonrioting means.