What is the Sanskrit root word for “ viññāṇa”?

In dependent origination , the word “ viññāṇa” arises and it is translated as consciousness. I am not satisfied and I guess some other members of this site are also not satisfied because then the dependent origination becomes: given volitional formations, consciousness arises. Isn’t volitional formation and ignorance itself due to consciousness? Therefore in order to understand “viññāṇa” I need to understand what is the Sanskrit root for the Pali word “ viññāṇa”? I looked up online Sanskrit dictionary, there is a word “vinn ” which means “understanding “. Do you think “vinn” is the root word for “ viññāṇa” ?