Etymology

reremouse

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Today it means: A bat (flying mammal). Full definition →

Middle English reremous ← Old English hrēremūs
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The story

  1. Old English · inherited fromhrēremūs
  2. Middle English · inherited fromreremous
  3. English todayreremouse

From Middle English reremous, from Old English hrēremūs, hrœ̄remūs (“bat”). Related to rear (“to move, shake, stir”).

Etymology from Wiktionary, CC BY-SA 4.0.