不ふ発はつ弾だん

noun

unexploded ordnance; UXO; unexploded bomb/shell

Refers to bombs, shells, or other military munitions that failed to detonate. Often used in news reports about wartime remnants or disposal operations.

• 工こう事じ現げん場ばで不ふ発はつ弾だんが見みつかった。

  An unexploded bomb was found at the construction site.

• 不ふ発はつ弾だんの処しょ理りには専せん門もんの部ぶ隊たいが必ひつ要ようだ。

  Disposal of unexploded ordnance requires a specialized unit.