エゴイスティック

na-adjective

egoistic; self-centered

Describes a person or attitude that prioritizes oneself over others; often carries a negative connotation.

• 彼かれのエゴイスティックな態たい度どにはうんざりだ。

  I'm fed up with his egoistic attitude.

• エゴイスティックな考かんがえ方かたを改あらためるべきだ。

  You should change your self-centered way of thinking.