Bodhi (2000) translates indriya as "spiritual faculty" and, at times (particularly when referring to Abhidhammic sources), "faculty." Buddhaghosa & Ñāṇamoli (1999) consistently translate indriya simply as "faculty" both in the context of the five spiritual faculties (e.g., pp. 128-9) and the 22 phenomenological faculties (Ch. XVI). Conze (1993) mentions and uses translations of "faculty," "controlling faculty" and "spiritual faculty," and refers to the five indriya as "cardinal virtues." Thanissaro (1998) uses "faculty." Rhys Davids & Stede (1921-25), p. 122-123, entry for "Indriya," (retrieved 2007-05-27) defines it as: "Indriya is one of the most comprehensive & important categories of Buddhist psychological philosophy & ethics, meaning 'controlling principle, directive force, élan, dynamis'...: (a) with reference to sense-perceptibility 'faculty, function'...."
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While the Pali commentaries consistently use the term bodhipakkhiyā dhammā ("states conducive to enlightenment") to refer to seven sets of enlightenment qualities (i.e., the four frames of reference, four right exertions, four bases of power, five faculties, five powers, seven bojjhanga, and Noble Eightfold Path) (see, e.g., Bodhi, 2000, p. 1937, n. 235), a search of the Sinhala SLTP tipitaka (using La Trobe University's search engine at "La Trobe University: Pali Canon Online Database". Archived from the original on 2007-09-27. Retrieved 2007-11-21.) finds the Pali phrase bodhipakkhiyā dhammā occurring only once in the early suttas: in the Sālā Sutta (SN 48.51) where the term references solely these five spiritual faculties of faith, energy, mindfulness, concentration and wisdom (Bodhi, 2000, p. 1695).
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While the Pali commentaries consistently use the term bodhipakkhiyā dhammā ("states conducive to enlightenment") to refer to seven sets of enlightenment qualities (i.e., the four frames of reference, four right exertions, four bases of power, five faculties, five powers, seven bojjhanga, and Noble Eightfold Path) (see, e.g., Bodhi, 2000, p. 1937, n. 235), a search of the Sinhala SLTP tipitaka (using La Trobe University's search engine at "La Trobe University: Pali Canon Online Database". Archived from the original on 2007-09-27. Retrieved 2007-11-21.) finds the Pali phrase bodhipakkhiyā dhammā occurring only once in the early suttas: in the Sālā Sutta (SN 48.51) where the term references solely these five spiritual faculties of faith, energy, mindfulness, concentration and wisdom (Bodhi, 2000, p. 1695).