text: In Indian religions, a rishi ( ) is an accomplished and enlightened person. They find mentions in various Vedic texts. Rishis are believed to have composed hymns of the Vedas. The Post-Vedic tradition of Hinduism regards the rishis as "great yogis" or "sages" who after intense meditation (tapas) realized the supreme truth and eternal knowledge, which they composed into hymns. The term appears in Pali literature as Ishi; in Buddhism they can be either Buddhas, Paccekabuddhas, Arahats or a monk of high rank.
  Etymology
  According to Indian tradition, the word may be derived from two different meanings of the root 'rsh' (). Sanskrit grammarians derive this word from the second meaning: "to go, to move". V. S. Apte gives this particular meaning and derivation, and Monier-Williams also gives the same, with some qualification.