Nous (British: /ˈnaʊs/;[1] US: /ˈnuːs/), sometimes equated to intellect or intelligence, is a philosophical term for the faculty of the human mind which is described in classical philosophy as necessary for understanding what is true or real. The three commonly used philosophical terms are from Greek, νοῦς or νόος, and Latin intellectus and intelligentia respectively. To describe the activity of this faculty, apart from verbs based on "understanding", the word "intellection" is sometimes used in philosophical contexts, and the Greek words noēsis and noein are sometimes also used.