Notes :The root is probably a derivative of *var_- 'to dry'.
Number in DED :5321
Proto-South Dravidian :*var_-, *văr_-aṇṭ- (?)
Meaning :to scratch
Tamil :var_aṇṭu (var_aṇṭi-)
Tamil meaning :to scratch (as with fingernails or claws)
Tamil derivates :var_uku (var_uki-) to scratch, paw
Kannada :beraṇṭu, beraṭu, beṇṭu
Kannada meaning :to dig or scratch with nails or claws, scratch
Kannada derivates :bagaru to scratch with nails or claws (or with 5202)
Notes :The root might be totally secondary: there are more certain roots in SDR with same meaning and similar phonetics, like *par_- 'to scratch' and *var- 'to write'.
Tamil meaning :to move, proceed, advance, be current or in use, be accustomed, practised; use, practise; give, distribute, cause to move, send, discharge, speak, utter
Tamil derivates :vaẓakkam usage, practice, habit, custom; giving, gift; vaẓakku moving, passing to and fro, usage, custom, way, method, justice, litigation, dispute; bounty; vaẓakku (vaẓakki-) to cause to go; (Devanesan) vaẓamai custom
Kannada meaning :course, way of action, plan, contrivance, use, custom, practice, exercise, state of being well-known or understood by practice, conversancy with, intimate or frequent converse or association, familiarity, familiar intercourse
Kannada derivates :baẓasu, baẓisu to use, spend as time, etc.
Tulu :baḷasuni
Tulu meaning :to serve out food, use, have in common use
Miscellaneous :KOR (O) balasɨ, (T) baḷci to serve out food
Number in DED :5292
Proto-South Dravidian :*vaẓ-
Meaning :to slip; to make a mistake
Tamil :vaẓu, vaẓuvu
Tamil meaning :error, mistake, failure, fault, lapse, damage, loss, sin, scandal, ill-repute, solecism, impropriety of language
Tamil derivates :vaẓāal failure, slipping; vaẓukkam error, slip, mistake, lapse of conduct; vaẓukkal slipperiness, slippery ground; vaẓukku (vaẓukki-) to slip, slide as in slippery places, err, commit a mistake, make an escape, be forgetful; n. slipping, error, mistake, fault, forgetfulness; vaẓutu lie, falsehood; vaẓumpu fault, error, evil, harm; vaẓuval sliding down, letting slip; vaẓuvaẓu (-pp-, -tt-) to slip, be slippery, smooth or polished, be infirm, unsteady; vaẓuvāmai rectitude, integrity, absence of error; vaẓuvu (vaẓuvi-) to err, swerve from the right, go astray, miss as a step, sway down as a load, be turned out of course, slip, be inaccurate; vaḷuvaḷu (-pp-, -tt-) to be slimy, slippery, be uncertain or indecisive as in language
Tamil meaning :to wipe, scrape, gather together as a pulpy mass, rub in with the hand as an ointment, smear as sandal-paste, roll up as one's clothes, shave
Tamil derivates :vaẓiyal that which is gathered together by wiping, scraping, etc.
Malayalam :vaṭikka
Malayalam meaning :to wipe off, scrape, polish, shave
Kannada :baẓi, boẓi
Kannada meaning :to sweep together as dust, wipe off or aside with the hand, scrape together with the hand, put on or apply to as lime, mud, etc. to a wall, cowdung to a floor, ointment to the body, besmear
Kannada derivates :caus. baẓacu, baẓicu, baẓisu, boẓisu; baẓu putting on or applying to; baẓugāre mortar that is applied to a wall; boẓiyuvike smearing; (Hav.) baḷugu to clean floor with cowdung