கல்லு
kallu
கல், vulg. கெல்லு, III v. t. dig out little by little, கிண்டு; 2. eat and spread like a cancer, அரி; 3. wash out, erode, as flowing water. மலைகெல்லி எலிபிடிக்கிறான், he excavates a mountain to catch a rat; (an expression used when a man accomplishes an easy object after arduous labour.) கல்லல், v. n. digging, sounding of alaram, tumult, disturbance.
J.P. Fabricius Dictionary
கல், மலை.
Na Kadirvelu Pillai Dictionary