1.
missing, whereabouts unknown, unaccounted for
A state in which a person's location is unknown and they cannot be contacted. Frequently used in news reports about disasters, accidents, and missing persons cases.
息子が行方不明になった。
My son has gone missing.
台風のあと、まだ三人が行方不明のままだ。
After the typhoon, three people are still unaccounted for.
警察は行方不明になった女性の情報を広く呼びかけている。
The police are making a broad appeal for information about the missing woman.
Compound of 行方 (whereabouts) + 不明 (unknown). Functions as both a noun and a na-adjective. Extremely common in news reports about disasters, accidents, and missing persons.
COMMON COLLOCATIONS:
- 行方不明になる: to go missing
- 行方不明者: missing person
- 行方不明届: missing person report
- 行方不明のまま: still missing
GRAMMAR:
- As noun: 行方不明になった人 (a person who went missing)
- As na-adjective: 行方不明な状態 (a state of being missing)
RELATED TERMS:
- 失踪: disappearance (more deliberate connotation)
- 行方: whereabouts
- 安否不明: safety unknown (used in disaster reports)