Tzadik/Zadik/Sadiq [tsaˈdik] (Hebrew: צדיק, "righteous one", pl. tzadikim [tsadiˈkim] צדיקים ṣadiqim) is a title in Judaism given to people considered righteous, such as Biblical figures and later spiritual masters. The root of the word ṣadiq, is ṣ-d-q ( tzedek), which means "justice" or "righteousness". The feminine term for a righteous person is tzadeikes/tzaddeket.
Tzadik is also the root of the word tzedakah ('charity', literally 'righteousness'). The term tzadik "righteous", and its associated meanings, developed in Rabbinic thought from its Talmudic contrast with hasid ("pious" honorific), to its exploration in ethical literature, and its esoteric spiritualisation in Kabbalah.