A native of inhabitant of the Czech Republic.

Dutch: Tsjech
Polish: Czech, pepiczek, Pepiczek, Pepik, pepik

A native or inhabitant of the former republic of Czechoslovakia.

synonyms: Czechoslovak, Czechoslovakian.

Dutch: Tsjech, Tsjechoslovaak, Tsjechoslowaak
Polish: Czechosłowak

The Slavic language of Czechs.

Dutch: tsjechisch, Tsjechisch
Polish: czeski, czeszczyzna, język czeski

Of or relating to Czechoslovakia or its people or their language:
— The Czech border.
— Czechoslovak nationalists.
— The Czechoslovakian population.

synonym: Czechoslovakian.

Dutch: Tsjechoslowaaks
Polish: staroczeski