Etymology

fastly

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Today it means: In a secure or firm manner; securely Full definition →

Middle English fastly ← Old English fæstlīċe ← Proto-West Germanic *fastulīkē
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fastly · adverb1

  1. Proto-West Germanic · inherited from*fastulīkê“securely, firmly”
  2. Proto-West Germanic · inherited from*fastulīkē
  3. Old English · inherited fromfæstlīċe“firmly, constantly”
  4. Middle English · inherited fromfastly
  5. English todayfastly

From Middle English fastly, fastliche, festliche, from Old English fæstlīċe (“firmly, constantly”), from Proto-West Germanic *fastulīkē, from Proto-West Germanic *fastulīkê (“securely, firmly”); equivalent to fast + -ly.

fastly · adverb2

  1. Middle English · inherited fromfastliche
  2. English todayfastly

From Middle English fastliche, fastly; equivalent to fast + -ly.

Etymology from Wiktionary, CC BY-SA 4.0.