IPA: /dɪsˈlɔɪəl/
KK: /dɪsˈlɔɪəl/
Not being faithful or loyal to someone or something, often betraying trust or allegiance.
He was disloyal to his friends by sharing their secrets.
Disloyal → It is formed from "dis-" (meaning apart or away) and "loyal" (from Old French *leial*, meaning faithful or true). The word "disloyal" means being unfaithful or not true to someone or something.
Think of being 'apart' ('dis-') from being 'faithful' ('loyal') — that's why disloyal means not being faithful.