门 mén

gate; door; gateway

doorway; gate

ticket (for theater, cinema etc)

to go out; to leave home; to go on a journey

entrance; door; gate

department; branch; section

specialist; specialized; customized

to drop in; to visit; to lock a door

popular; hot; in vogue

to knock on a door

outpatient service

entrance door; to enter a door; introduction (to a subject)

doorstep; sill; threshold

valve (mechanical)

a trick; an ingenious method; know-how

way of doing sth; the right social connection

doorbell

a neglected branch (of arts, science, sports etc)

to call on sb; to drop in; to visit sb's home

myriad; all kinds of; all sorts of

lit. to enter by the back door; fig. to gain influence by pull or unofficial channels

security door