亡失

1. Origins, structure, and basic meaning

• Structure: 亡失, read ぼうしつ, means the loss or disappearance of something previously present.
• Basic usage: It is a written-style expression for losses such as missing documents or lost memory.

2. Common pitfalls and similar expressions

• Range of objects
  • 紛失 is often used for misplaced objects, while 亡失 here covers the loss of both documents and memory.
• Not necessarily death
  • The example's 記憶の亡失 means loss of memory. The presence of 亡 does not make the word mean a person's death.