IPA: //ˌnɒn.ɪn.təˈfɪə.rəns//
KK: /nɑnˌɪntərˈfɪərəns/
The practice of not getting involved in the internal affairs or decisions of another country or organization.
The principle of noninterference is important in international relations.
Noninterference → It is formed from "non-" (meaning not) and "interference" (from Latin "interferre", meaning to intervene or come between). The word describes a state of not intervening or not coming between in a situation.
Think of 'not' ('non-') getting in the way of something — that's why noninterference means not intervening.