1. 利己主义的：self-interest 利己主义 | self-interested 利己主义的 | self-invited 不请自来的

2. 自私自利的：self-conscious 洋洋自得的 | self-interested 自私自利的 | self-righteous 自以为是的

3. 利己主义的/自我本位的：self-interest /利己主义/私利/ | self-interested /利己主义的/自我本位的/ | self-introduction /毛遂自/

1. 自私的;只为自己着想的
If you describe someone as self-interested, you disapprove of them because they always want to do what is best for themselves rather than for other people.

e.g. Narrowly self-interested behaviour is ultimately self-defeating.
狭隘自私的行为最终会自拆台脚。