Etymology

unmercy

U1N1M3E1R1C3Y4

Today it means: The lack or absence of mercy; mercilessness. Full definition →

Middle English onmerci
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The story

  1. Middle English · inherited fromonmerci
  2. English todayunmercy

From Middle English onmerci, unmerci, unmercy; equivalent to un- (“lack or absence of”) + mercy.

Etymology from Wiktionary, CC BY-SA 4.0.