{"era":"current","word":"tsar","meaning":"a title for an emperor, especially the rulers of Russia and Bulgaria","children":[{"era":"modern","word":"царь","meaning":"tsar","children":[{"era":"pre-1100","word":"цьсарь","meaning":"tsar","children":[{"era":"classical","word":"Caesar","meaning":"the name Caesar, later an imperial title","children":[{"era":"pre-1100","word":"*cěsařь","meaning":"tsar","children":[{"era":"pre-1100","word":"*kaisaraz","meaning":"Caesar; emperor","children":[],"language":"Proto-Germanic"}],"language":"Proto-Slavic"}],"language":"Latin"}],"language":"Old East Slavic"}],"language":"Russian"}],"language":"Modern English"}