IPA: /ˌʌnɪˈluːʒənd/
KK: /ʌnɪˈluːʒənd/
Not having false beliefs or misconceptions; seeing things as they really are.
After years of experience, she became unillusioned about the realities of the industry.
Unillusioned → It is formed from "un-" (meaning not) and "illusion" (from Latin "illudere", meaning to mock or deceive). The word describes a state of being not deceived or free from illusions.
Think of 'not' ('un-') being related to 'deception' ('illusion') — that's why unillusioned means not deceived.