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fortress
UK
/ˈfɔːtrəs/
US
/ˈfɔrtərəs/
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Compare fortress, fort, castle, and stronghold in meaning and usage.
Learn common collocations with fortress, such as impregnable fortress.
Explain why fortress is a countable noun and how to form its plural.
Explore figurative uses of fortress, such as a fortress of solitude.
Check whether fortress is commonly used as a verb or adjective, and suggest natural alternatives.
Practice the pronunciation of fortress and notice the difference between its UK and US forms.
Write five B2-level sentences with fortress and translate them into Russian.
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