IPA: /nɒnˈlɔɪəl/
KK: /nɑnˈlɔɪəl/
Not showing loyalty or faithfulness to someone or something.
He was considered nonloyal for switching teams mid-season.
Nonloyal → It is formed from "non-" (meaning not) and "loyal" (from Old French *leial*, meaning faithful or true). The word "nonloyal" means not faithful or not true to someone or something.
Think of 'not' ('non-') being added to 'faithful' ('loyal') — that's why nonloyal means not being faithful.