Similar words: remorselessly, remorse, remorseful, morsel, uselessness, useless, baseless, uselessly. Meaning: [rɪ'mɔrslɪs /-'mɔːs-] 
adj. without mercy or pity.
adj. without mercy or pity. 
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31. Our ships are in pursuit, and justice will be dispensed by cannonade and cutlass, and all manner of remorseless pieces of metal.
32. They reported exchanging fire with "remorseless" enemies, who knew the layout of the hotel well.
More similar words: remorselessly, remorse, remorseful, morsel, uselessness, useless, baseless, uselessly, noiseless, senseless, ceaseless, noiselessly, ceaselessly, defenseless, morse, tremor, selflessness, carelessness, hopelessness, homelessness, relentlessness, remoteness, selfless, humorless, careless, ageless, memory address, selflessly, more or less, homeless.