noun, noun or participle which takes 'suru', transitive verb
loss; losing something
Formal term for losing an object, often used in legal, official, or written contexts. In everyday speech, なくす or 落とす are more common.
遺失物は駅の窓口に届けられていた。
The lost item had been turned in at the station counter.
パスポートを遺失し
If you lose your passport, please contact the embassy immediately.