自反

自反	zì fǎn	to introspect / to self-reflect / (math.) reflexive
自	zì	(bound form) self; oneself / from; since / naturally; as a matter of course
反	fǎn	contrary / in reverse / inside out or upside down / to reverse / to return / to oppose / opposite / against / anti- / to rebel / to use analogy / instead / abbr. for 反切 phonetic system