:For the Hebrew letter mistakenly called "Tzadik", see Tsade. Tzadik ("righteous one;" pl. tzadikim)'s a title which's generally given to those who're considered to be righteous such as a spiritual master or rebbe. The root of the word tzadik,'s tzedek (צדק), which means justice or righteousness. This term thus refers to one who acts righteously. In Arabic the word/name "saddiq" (صادق), has a similar meaning. The title of Voltaire's satirical novel Zadig… (More on Tzadik)