barbican

باللغة العربية: برج محصن، بربكان

1. A tower at the entrance to a castle or fortified town. · Near-synonym: guardhouse
2. A fortress at the end of a bridge.
3. An opening in the wall of a fortress through which the guns are levelled; a narrow loophole through which arrows and other missiles may be shot.
4. A temporary wooden tower built for defensive purposes.

الجمع barbicans