noun, noun or participle which takes 'suru', transitive verb, intransitive verb
Formal term for losing or forfeiting something, often used in legal or official contexts. Can be used as a noun or with する as a transitive or intransitive verb.
重要な書類の亡失を防ぐために、バックアップを取ってください。
Please make backups to prevent the loss of important documents.
He lost the company's data through negligence.