窃せつ用よう

noun, noun or participle which takes 'suru'

unauthorized use; misappropriation of information

Rare formal term for using something without permission, especially information obtained through one's position. Often used in legal or bureaucratic contexts.

• 公こう務む員いんが職しょく務む上じょう知しり得えた情じょう報ほうを窃せつ用ようすることは許ゆるされない。

  A public official must not misappropriate information obtained in the course of their duties.

• この書しょ類るいの窃せつ用ようは固かたく禁きんじられています。

  Unauthorized use of this document is strictly prohibited.