známé

In a sentence

• Mám mnoho známých v tomto městě.

  I have many acquaintances in this city.

  Here, "známých" is the plural, genitive case form of "známý," meaning 'acquaintance.' It is used to indicate social connections.

• To je známé město po celé zemi.

  That is a well-known city throughout the country.

  Here, "známé" is used as an adjective, meaning 'well-known,' to describe the city globally.

• Ta hudební skladba mi je známá.

  That music piece is familiar to me.

  Here, "známá" is the feminine form of the adjective "známý," meaning 'familiar,' describing something recognizable to the speaker.