The obscurations to liberation and omniscience. They are generally categorized as two types: affective obscurations (kleśāvaraṇa), the arising of afflictive emotions; and cognitive obscurations (jñeyāvaraṇa), those caused by misapprehension and incorrect understanding about the nature of reality.
The term is used also as a reference to a set five hindrances on the path: longing for sense pleasures (Skt. kāmacchanda), malice (Skt. vyāpāda), sloth and torpor (Skt. styānamiddha), excitement and remorse (Skt. auddhatyakaukṛtya), and doubt (Skt. vicikitsā).