merciless Meaning, Definition & Usage

  1. adjective having or showing no mercy
    unmerciful.
    • the merciless enemy
    • a merciless critic
    • gave him a merciless beating

WordNet

Mer"ci*less adjective
Definitions
  1. 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.

Webster 1913