Hitbodedut, from a root meaning to be alone or to seclude oneself, names Jewish solitary prayer conducted in the practitioner's own spontaneous, unscripted words rather than through the fixed liturgy of the siddur, and it is best known in its most fully developed and most widely practised form as taught by Rabbi Nachman of Breslov, the early nineteenth century Hasidic master, who urged his followers to set aside a full hour daily, ideally alone outdoors, to speak to God directly and personally in their own vernacular about whatever genuinely occupies their heart, worries, failings, hopes and gratitude alike, treated as being as legitimate a form of prayer as the fixed liturgical text.
Nachman's teaching frames hitbodedut as addressing something fixed prayer, valuable as it is, cannot fully reach: the specific, personal, often unpolished content of an individual life, which he held needed its own unscripted outlet rather than being filtered exclusively through inherited communal formulas, however beautiful, that were composed for every worshipper rather than for any one person's particular circumstances. The term itself predates Nachman considerably, appearing in earlier medieval Jewish philosophical and kabbalistic literature to describe forms of contemplative seclusion, but Nachman's specific formulation, daily, spoken, personal and unscripted, gave the practice its most influential and most widely recognised modern shape.