self-centeredness; selfishness; egoism
Describes an attitude of putting one's own interests first, often used in formal or critical contexts.
I'm fed up with his self-centered attitude.
Teamwork cannot work with a selfish way of thinking.
利己的 is a more common and direct adjective for 'selfish', while 自家本位 is a formal noun emphasizing self-centeredness as a principle.
自己中心的 is the everyday word for 'self-centered', whereas 自家本位 is more literary and less frequent in casual speech.
Compound of 自家 (じか, 'self; one's own') and 本位 (ほんい, 'standard; basis'), literally meaning 'self as the standard'. The exact historical derivation is uncertain, but the term follows a common Sino-Japanese compounding pattern.