贯通

to link up / to thread together

to pierce through / to pass through / to be stringed together / string of 1000 cash

to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc

classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)

to master the subject via a comprehensive study of surrounding areas