Question: what is ayacut in tamil?
Answer: Sounds similar to "Anicut" from Anaikattu in Tamil meaning a dam or a barrage. - KGN Ayam in Sanskrit means AREA, Kattu : Limit ( i guessed it based on Tamil/sanskrit) so Ayakattu became AYACUT in english( by britishers) So basically it means Area Limit which will be irrigated by this water.