Let us understand what our own selfish genes are up to, because we may then at least have the chance to upset their designs. [Richard Dawkins, "The Selfish Gene," 1976]
Related: Selfishly; selfishness.
Similar formations in German selbstisch, Swedish sjelfvisk, Danish selvisk.self,自己的,自身的,-ish,形容词后缀。引申词义自私的。