IPA: /nɒnˈfɛdəreɪtɪd/
KK: /nɑnˈfɛdəˌreɪtɪd/
Not organized into a federation or alliance; existing independently rather than as part of a larger group.
The nonfederated states operate independently from the central government.
Nonfederated → It is formed from "non-" (meaning not) and "federated" (from Latin "foedus", meaning treaty or league). The word describes something that is not part of a federation or alliance.
Think of 'non-' meaning not, and 'federated' relating to a league or alliance — so nonfederated means not part of a league.