merciless
a. இரக்கமற்ற, கொடிய மன்னிக்குங் குணமற்ற,
Mer"ci*less, a. Defn: Destitute of mercy; cruel; unsparing; -- said of animate beings, and also, figuratively, of things; as, a merciless tyrant; merciless waves. The foe is merciless, and will not pity. Shak. Syn. -- Cruel; unmerciful; remorseless; ruthless; pitiless; barbarous; savage. -- Mer"ci*less*ly, adv. -- Mer"ci*less*ness, n.