köken: Possibly from Proto-Sabaki *-elela (“to be clear”), in which case by surface analysis, -elea (“to be clear”) + -vu, but the -l- turning into an -r- is unexplained. Compare Giryama -elevu, which seems cognate but shows -l- where -r- would have been expected.
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…