The term 'Czech or Slovakian' can be summarized by the crossword solution 'SLAV', which is a four-letter word. Slavs are an ethnic group of people who speak the Slavic language and inhabit Central and Eastern Europe. The Czechs and Slovaks are two distinct Slavic nations, both of which have their own languages, cultures, and histories. The Czech Republic and Slovakia were formerly part of the same country, Czechoslovakia, until they peacefully separated in 1993.