postern

n (arch 古) side or back entrance, esp a concealed entrance to a castle, etc 边门; 後门; 边道; 便道; （尤指城堡等的）暗道: [attrib 作定语] a postern door/gate 後门.

post-date, post-free, post-haste, post-industrial, post-mortem, post-office, post-paid, post-town, post-war, postage, postage stamp, postal, postal code, postal order, postcard, poste restante, poster, poster paint (also `poster colour), posterior, posterity, postgraduate, posthumous, posthumously, postilion (also posttillion), posting, postman, postmark, postmaster, Postmaster General, postnatal, postpone, postponement, postprandial, postscript, postulant, postulate, postulation, posture, posturer, posy,