itself
US /ɪtˈself/
UK /ɪtˈself/

1.
它自己
used as the object of a verb or preposition to refer to a thing, animal, or idea previously mentioned
:
•
The cat groomed itself.
猫咪梳理自己。
•
The door closed by itself.
门自己关上了。
2.
本身, 自己
used to emphasize the thing, animal, or idea mentioned
:
•
The city itself is beautiful, but the surrounding areas are not.
城市本身很美,但周边地区不美。
•
The problem itself is not that difficult.
问题本身并不那么困难。