An Etymological Dictionary of Astronomy and Astrophysics

A combining form of self with a range of related meanings.

Etymology (EN): From M.E., from O.E. self, seolf, sylf “one’s own person, same;” cf. O.Fris. self, Du. zelf, O.H.G. selb, Ger. selbst.

Etymology (PE): Xod-, from xod; Mid.Pers. xwad “self; indeed;”
Av. hva- “self, own.”