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.
USAGE:
A very common expression in news reports. Often used with になる (to go missing) or の/な as a modifier. The compound is made of 行方 (whereabouts) + 不明 (unknown).
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