通关密语

password

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 clear customs / (gaming) to finish (a game, a level, a stage, etc)

mountain pass / to close; to shut; to turn off / to confine; to lock (sb) up; to shut (sb in a room, a bird in a cage etc) / to concern; to involve

secret / confidential / close / thick / dense

secret talk / coded language / cypher / code

dialect / language / speech

to tell to