Tzadik (Hebrew: צַדִּיק ṣaddīq [tsaˈdik], "righteous [one]"; also zadik or sadiq; pl. tzadikim [tsadiˈkim] צדיקים ṣadīqīm) 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 (צ־ד־ק ṣ-d-q), which relates to "justice" or "righteousness". When applied to a righteous woman, the term is inflected as tzadeket singularly or tzidkaniot in the plural.
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.