self、own、self、-ish、形容詞接尾辞。selfishから派生した。
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.