A smaller number of nouns in Tamil end in ì -ru (LT alveolar
r). All of these nouns change this to ±ì ttu before
case, i.e. they undergo gemination. Thus Èì aaru
颉 aattu; `pertaining to the river';
×´ºì kenaru `well' 
×´º¢â
kenattu `pertaining to the well'. Other examples are ´¿Õì
kayiru `rope', ¿Õì vayiru `stomach', ضÔì
sooru `cooked rice', and a few others.The LT forms of these
words undergo gemination from ì to ±ì, but in ST, the ì forms
are phonetically identical with ç, while ±ì merges with ¢â.