fortress
Concise Oxford English Dictionary © 2008 Oxford University Press:
fortress/ˈfɔːtrəs/
▶noun
- 1 a military stronghold, especially a strongly fortified town.
- 2 a person or thing not susceptible to outside influence.
– origin ME: from OFr. forteresse ‘strong place’, based on L. fortis ‘strong’.
'fortress' also found in these Oxford entries:
