IPA: //ˌiːɡəˈtɪstɪkəl//
KK: /ɪˈɡoʊtɪskəl/
Having an inflated sense of self-importance and often focusing on oneself rather than others.
His egotistical behavior made it hard for his friends to enjoy their time together.
Egotistical → It is formed from "ego" (from Latin, meaning I or self) and "-istical" (a suffix used to form adjectives). The word "egotistical" describes someone who is excessively focused on themselves or their own interests.
Think of 'ego' as representing the self, and remember that 'egotistical' means someone who is overly concerned with their own self.