disappearance; running away; going missing; absconding
社長は家族を残し失踪した。
The company president left his family and disappeared.
警察は大学生の失踪を捜査している。
The police are investigating the university student's disappearance.
七年間の音信不通の後、裁判所は彼の失踪宣告を出した。
After seven years of no contact, the court issued a declaration of his disappearance.