Mahāsukha

mahāsukha (T. bde ba chen po; C. dale; J. dairaku/tairaku; K. taerak 大樂). Translated as “great bliss,” "great happiness," etc. A term in Buddhist tantra with a range of denotations.

In a common technical usage, "it refers to a special bliss consciousness generated during the practice of Niruttara-yoga tantra by causing the winds (prāṇa) to enter the central channel (avadhūtī). This bliss consciousness is then to be used to perceive emptiness (śūnyatā) directly, resulting in what is called the union of bliss and emptiness."