Once Dravidians became stagnant in present day regions the new words coined by one of them have entered as foreign words into other Dravidian languages. They no longer associate with the sound changes of their common vocabulary. Good thing is that we can still deduce native forms of other Dravidian language words.
Today, I would like to discuss about Kannada form of the capital of Tamil Nadu, Chennai.
Kannada words with initial ki start with ce in Tamil.
eg. kivi(Kannada) -> cevi(Tamil) (=ear)
Kannada words that end with e end with ai in Tamil.
eg. kOTe(Kannada) -> kOTTai(Tamil) (=fort)
Hence, the Kannada form of cennai is kinne.
Similarly, Tulu form -> kenne
Malayalam form -> cenna