These are the main causes of dukkha. The version we are used to is: desire, anger, ignorance. Another version is: greed, aversion, delusion. And so on.

They are the root of the kleshas (mental states that cloud the mind) — in Sino-Korean the word for kleshas is bon nae, which begins the second of the four great vows (translated as delusions) 

For more information, see https://en.wikipedia.org/wiki/Three_poisons; and you might also want to check out https://en.wikipedia.org/wiki/Kleshas_(Buddhism).