fortress

Pháo đài, thành lũy

a large, strong building or group of buildings that can be defended against attack

• a fortress

Collocations fortress town · medieval fortress

• The castle was a formidable fortress.

  Cánh cổng lâu đài là một pháo đài đáng sợ.

Vị trí vững chắc, chỗ hiểm

a place that is very strong and difficult to attack or defeat

• a fortress

Collocations fortress of solitude · economic fortress

• The company has become a fortress against competition.

  Công ty đã trở thành một pháo đài chống lại sự cạnh tranh.