IPA: //ʌnˈtɔːt//
KK: /ʌnˈtɔt/
Describing someone or something that has not received formal education or training, often implying a natural ability or lack of knowledge.
Despite being untaught, she showed a remarkable talent for painting.
Untaught → It is formed from "un-" (meaning not) and "taught" (the past participle of "teach", which comes from Old English "tǣcan", meaning to show or instruct). The word "untaught" means not having been instructed or educated.
Think of 'not' ('un-') having been 'instructed' ('taught') — that's why untaught means not having received teaching.