Tzadik (also in other transliterations like Tzaddik, Zaddiq or Sadiq) in Hebrew צדיק means “righteous” (plur. צדיקים ṣaddīqīm) and is one of the most noteworthy titles used in Judaism, generally given to those who are considered the just, the upright ones and persons of integrity regarding their behavior, like many fathers of the Biblical tradition, a spiritual master or a rabbi. The root of the word ṣaddīq is ṣ-ḏ-q (צדק, ṣeḏeq) which means “justice” or “righteousness”, also the root of tzedakah (“charity”, lett. “justice”); this term therefore refers to the one who acts justly.