01 a. Destitute of mercy; cruel; unsparing; -- said of animate beings, and also, figuratively, of things; as, a merciless tyrant; merciless waves.
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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.