Mer″ci‐less, a. 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.