fortifications; revetments; defences zob.także umocnienie -
~ brzegowe - shore defences, coast(al) defences
~ betonowe - concrete fortifications
~ graniczne - frontier fortifications, border revetments
~ kamienne - stone defences
~ nabrzeżne - seacoast fortifications, coastal fortifications
~ nieprzyjaciela - enemy defences
~ obronne - defences, defensive fortifications, defensive revetments
~ obronne nie do zdobycia - impregnable defences
~ podwodne - underwater defences
~ podziemne - underground defences
~ polowe - field fortifications, field defences, entrenchments; field-work
~ portowe - harbour fortifications
~ pospieszne - hasty fortifications
~ prowizoryczne - makeshift fortifications, hasty fortifications
~ przeciwpowodziowe - flood defences, flood revetments, flood walls
~ przygotowane starannie - deliberate fortifications
~ przygraniczne - frontier fortifications
~ stałe - permanent fortifications
~ starannie przygotowane - carefully prepared fortifications
~ tyłowe - rear fortifications
~ z drutu kolczastego - barbed wire defences
~ ziemne - earthen fortifications, bulwark
~ ziemno-betonowe - earth-and-concrete fortifications

n pl fortifications
budowa ~ń polowych organization of the ground

bud. supports
~ przeciwpowodziowe - flood defences
flood revetments
flood walls
~ wykopu excavation supports