信書

しんしょ
letter
personal correspondence

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しんしょ【信書】

a letter; 〈集合的に〉 correspondence.

●信書の往復をする hold correspondence 《with…》; correspond 《with…》

・信書のプライバシーを侵す violate the privacy of (personal) correspondence.

信書隠匿罪 (the crime of) concealing correspondence.

信書開披罪 (the crime of) opening sealed correspondence.