Etymology

unsteadfast

U1N1S1T1E1A1D2F4A1S1T1

Today it means: Not steadfast; wavering, unfaithful. Full definition →

Middle English unstedefast ← Old English unstædefast
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The story

  1. Old English · inherited fromunstædefast
  2. Middle English · inherited fromunstedefast
  3. English todayunsteadfast

Inherited from Middle English unstedefast, from Old English unstædefast; equivalent to un- + steadfast.

Etymology from Wiktionary, CC BY-SA 4.0.