to let loose, let go.

The goals of yoga are varied and range from improving health to achieving Moksha. In Indian religions, moksha (Sanskrit: मोक्ष mokṣa) or mukti (Sanskrit: मुक्ति), literally "release" (both from a root muc "to let loose, let go"), is the liberation from samsara and the concomitant suffering involved in being subject to the cycle of repeated death and reincarnation. Within the Hindu monist schools of Advaita Vedanta, Shaivism and Jainism, the goal of yoga takes the form of Moksha, which is liberation from all worldly suffering and the cycle of birth and death (Samsara), at which point there is a realization of identity with the Supreme Brahman.

(even taken from wikipedia)