IPA: /ˌʌn.ɛdʒ.ʊˈkeɪ.tɪd/
KK: /ʌnˈɛdʒʊˌkeɪtɪd/
Someone who has not received an education or lacks knowledge in certain areas.
He felt uneducated compared to his peers who had attended university.
Uneducated → It is formed from "un-" (meaning not) and "educate" (from Latin "educare", meaning to bring up or rear). The word "uneducated" means not having received an education or lacking knowledge.
Think of 'not' ('un-') having been 'brought up' ('educate') in terms of learning — that's why uneducated means lacking education.