த்
t
. The seventh consonant and fourth வல்லினம், but properly a soft dental. The duplicated த் has the effect of making a neuter verb, active--as வருந்த, to suffer pain, வருத்த, to cause pain. Also to give a noun an adjective form--as மருந்து, medi cine, making மருத்து, which with பை, is மருத்துப்பை, a medicine bag.