"You cannot just say you haven't heard, you know. Should I go there and tell you straight to your face?"
Here's a breakdown of the sentence:
* Kekunnilla kekunillaentha parayane ne ivide range koravadaathondakum: This translates to "You cannot just say you haven't heard". "Kekunnilla" means "haven't heard", "parayane" means "saying", "ne" means "you" and "ivide range koravadaathondakum" means "cannot just say".
* Njan avide ethiyitu neritu paranjamathito?: This translates to "Should I go there and tell you straight to your face?". "Njan" means "I", "avide" means "there", "ethiyitu" means "going", "neritu" means "straight", "paranjamathito" means "tell" and "?" indicates a question.
The overall meaning is that the speaker is accusing the listener of lying about not hearing something. The speaker is frustrated and is implying they are willing to go to the listener's location and confront them directly.