Read this: Some of the Dravidian languages, such as Telugu, Tamil, Malayalam, and Kannada, have a distinction between voiced and voiceless, aspirated and unaspirated only in loanwords from Indo-Aryan languages. In native Dravidian words, there is no distinction between these categories and stops are underspecified for voicing and aspiration.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): What is underspecified for voicing and unaspiratoin?
unanswerable