IPA: /nɒnˈɒksɪdaɪŋ/
KK: /nɑnˈɑksɪˌdaɪŋ/
Not causing or promoting oxidation, which is a chemical reaction where a substance combines with oxygen.
The nonoxidizing agent is safe to use in environments where oxidation could be harmful.
Nonoxidizing → It is formed from "non-" (meaning not) and "oxidizing" (from "oxidize", which comes from the Latin "oxydare", meaning to combine with oxygen). The word "nonoxidizing" means not combining with oxygen or not causing oxidation.
Think of 'not' ('non-') causing a reaction with 'oxygen' ('oxidizing') — that's why nonoxidizing means it doesn't react with oxygen.