also: ちょくひ
noun
personal; confidential (on a letter)
Written on the outside of a letter to indicate it is personal and should be opened only by the addressee. Used in formal or traditional correspondence.
封筒に「直披」と書いてある手紙は、本人以外が開けてはいけない。
A letter marked '直披' on the envelope should not be opened by anyone other than the addressee.
昔の手紙には、よく「直披」
In old letters, words like '直披' and '親展' were often used.
Kanji form used in formal letter writing; the reading じきひ is standard for this meaning.
Alternate reading ちょくひ is less common but attested in formal contexts.
Compound of 直 (direct, personal) and 披 (open, reveal). The exact historical derivation is uncertain, but the term is conventionally used in formal letter writing.