self-interested person

Why would a self-interested person like him want to help us? Don't even bother asking.
¿Por qué nos querría ayudar un interesado como él? Ni te tomes la molestia de pedírselo.
As a self-interested person, the notion of generosity is alien to her.
Por ser una interesada, la idea de generosidad le resulta estrafalaria.
Palabra del día
permitirse