Sanskrit word is Avidya. Literally, it means darkness without illumination. Actually it refers to illusion without englightenment, i.e., the illusory phenomena for realities. Avidya is the first or the last of the Twelve Nidanas. Ignorance, karma and desire are the three forces that cause reincarnation.

Infinite Life Sutra

One of the three most important Sutras in Pure Land Study. (The other two primary Pure Land Sutras are the Amitabha Sutra and the Contemplation Sutra.) In the Infinite Life Sutra, Shakyamuni Buddha explains how Amitabha Buddha created the Pure Land and made 48 Great Vows promising that anyone who repeated his name with a sincere desire to be reborn in the Pure Land would be reborn there. The Sutra is summarized on the page titled "The Contemplation Sutra ."