一いっ封ぷう

noun

sealed letter; sealed document

Refers to a letter or document that has been sealed, often in a formal or official context. The gloss 'enclosure' is less common and typically applies when the sealed item is enclosed within something else.

• 彼かれは重じゅう要ような書しょ類るいを一いっ封ぷうにして送おくった。

  He sent the important documents as a sealed letter.

• 机つくえの上うえに未み開かい封ふうの一いっ封ぷうが置おいてあった。

  An unopened sealed letter was on the desk.