çar

1) four, the cardinal number four 2) tsar

- Ji van çar padîşahan, tu dixwazî kîjanê ji xwe re bikî nimûne, û çima?: Which of the four kings would you like to imitate, and why?

From Avestan chathru, čathwaro,

Proto-Indo-European root meaning *kwetwer- "four".

Sanskrit catvarah,
Pali catu,
Persian čatvar,
Greek tessares,
Latin quattuor,
French quatre,
Spanish cuatro,
Oscan petora,
Old Church Slavonic četyre,
Russian četyre,
Lithuanian keturi,
Old Irish cethir,
Welsh pedwar.

cadre, cahier, carillon, carrefour, catty-cornered, diatessaron, escadrille, farthing, firkin, fortnight, forty, four, fourteen, fourth, quadrant, quadraphonic, quadratic, quadri-, quadrilateral, quadriliteral, quadrille, quadriplegia, quadrivium, quadroon, quadru-, quadruped, quadruple, quadruplicate, quarantine, quarrel, quarry, quart, quarter, quarterback, quartermaster, quarters, quartet, quarto, quaternary, quatrain, quattrocento, quire, squad, square, tessellated, tetra-, tetracycline, tetrad, tetragrammaton, tetrameter, tetrarch, trapezium.