Etymology

faithful

F4A1I1T1H4F4U1L1

Today it means: Loyal; adhering firmly to person or cause. Full definition →

Middle English feithful
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The story

  1. Middle English · inherited fromfeithful
  2. English todayfaithful

From Middle English feithful, equivalent to faith + -ful.

Etymology from Wiktionary, CC BY-SA 4.0.