C1 noun /ˈiːɡoʊˌɪzəm/
egoism
égoïsme
Meaning
An ethical theory that treats self-interest as the foundation of morality; also, excessive preoccupation with oneself.
Example
His decisions were often driven by egoism rather than concern for others.
Ses décisions étaient souvent motivées par l'égoïsme plutôt que par la préoccupation pour les autres.