IPA: /ˌɪdɪˈɒtɪk/
KK: /ɪˈdɪətɪk/
Showing a lack of intelligence or common sense; very foolish or silly.
His idiotic comments made everyone laugh, but they also showed how little he understood the topic.
Idiotic → It is formed from "idio-" (from Greek "idios", meaning one's own or private) and "-tic" (a suffix used to form adjectives). The word "idiotic" refers to something that is characteristic of a private or personal lack of intelligence, often implying foolishness.
Think of 'idios' meaning one's own, which helps you remember that 'idiotic' describes something that seems foolish or lacking intelligence, as if it is a personal trait.