Dakini (Skt. ḍākinī; Tib. མཁའ་འགྲོ་མ་, khandroma; Wyl. mkha' 'gro ma) — a female embodiment of enlightened energy. The Sarvabuddhasamayoga Tantra is one of the earliest sources to provide the etymology 'sky-goer' for the word ḍākinī: 'Here the root is understood to be ḍai, which expresses going in the sky; a 'ḍākinī' is known as the power (siddhi) of moving everywhere through space.' Female lamas and the spiritual wives of male lamas often have the epithet 'khandro'.