除非

除非	chú fēi	only if (..., or otherwise, ...) / only when / only in the case that / unless
除	chú	to get rid of / to remove / to exclude / to eliminate / to wipe out / to divide / except / not including
非	Fēi	abbr. for 非洲, Africa
非	fēi	to not be; not / wrong; incorrect / non-; un-; in-; de- / to reproach; to blame / (coll.) to insist on; simply must