IPA: /ˈbɑːrbɪkən/
KK: /ˈbɑːrbɪkən/
A structure, often a tower, built for defense at the entrance of a castle or town, usually located near a gate or drawbridge.
The soldiers stood guard at the barbican, ready to defend the castle from any attackers.
Barbican is derived from the Old French word 'barbacane', which itself comes from the Arabic 'barqān' (meaning a fortified structure or tower). The term originally referred to a defensive outwork or fortification, typically a tower or gatehouse, used to protect a castle or city entrance.
Imagine a 'fortified structure' ('barqān') that serves as a protective tower or gatehouse — that's what a barbican is.