Meaning of ITSELF in English
pron. emphatic and refl. form of IT(1). by itself apart from its surroundings, automatically, spontaneously. in itself viewed in its essential qualities (not in itself a bad thing).
[ OE f. IT(1) + SELF, but often treated as ITS + SELF (cf. its own self) ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012