Proto-Nilgiri : *kurt-
Meaning : to build up stones
Kota : kut- (kuty-) "to build up stones into wall"
Toda : ? kušt- (kušty-) "to build (wall of pen, etc.) with stones"
Notes : The correspondence "Kota -t- : Toda -št-" decidedly points to PN *-rt- (cf. *ert, *kartal, etc.), although the presence of such a cluster in a monosyllabic verbal base is somewhat weird.
Number in DED : 1720