czar (zär, tsär) KEY
Russian tsar', from Old Russian tssar, emperor, king, from Old Church Slavonic tssar, from Gothic kaisar, from Greek, from Latin Caesar, emperor ; see caesar
The word czar can also be spelled tsar. Czar is the most common form in American usage and the one nearly always employed in the extended senses "any tyrant" or informally, "one in authority." But tsar is preferred by most scholars of Slavic studies as a more accurate transliteration of the Russian and is often found in scholarly writing with reference to one of the Russian emperors.