門 - gate, counter for cannons

noted family; noble family

pupil; disciple; follower

back gate

(medical) specialist

specialist; expert; professional; authority; pundit

door

family; clan; kin

specialist shop; shop specializing in a particular type of product

outsider; layman; amateur

New Year's pine decoration

strait with a roaring tidal ebb and flow; whirlpool; maelstrom

gateway to success