köken: Of unclear origin. Traditionally derived from चतुर् (catur, “four”), with an interpretation of "having the four"; the four in question are folk-etymologically interpreted as the Vedas. An alternative theory considers the word a Dravidian borrowing; compare Tamil சதுர் (catur, “ability, skill, dexterity”) and Telugu చదువు (caduvu, “to read, study”). In light of the exact phonetic and semantic…