I am starting to explore Luminous Essence: A Guide to the Guhyagarbha Tantra, where in the first section on the "title", says:
All phenomena of saṃsāra and nirvāṇa are inseparable with the enlightened state; they dwell primordially as the eternal wheel of adornment of enlightened body, speech, and mind.
Not knowing much Tibetan buddhism (yet), what is meant by the "wheel" exactly? And by the wheel of "adornment"? Finally, what does it mean to dwell primordially, what is the actual word used that is translated to primordial from Tibetan? Same with the word wheel, what is the Tibetan word for it and also what is it talking about more specifically?