unexploded ordnance

lost or discarded explosive devices or material

en-GB/ˌʌnɛkˈspləʊdɪd ˈɔːdnəns/
en-US/ˌʌnɪkˈsploʊdɪd ˈɑɹdnəns/

زمرے:

hazardexplosive weaponammunitionwastelost, mislaid, and abandoned property