不通

不通	bù tōng	to be obstructed / to be blocked up / to be impassable / to make no sense / to be illogical
不	bù	no; not so / (bound form) not; un-
通	tōng	to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc
通	tòng	classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)