Etymology

boastful

boast·ful
B3O1A1S1T1F4U1L1

Today it means: Tending to boast or brag. Full definition →

Middle English bostful
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The story

  1. Middle English · inherited frombostful
  2. English todayboastful

From Middle English bostful, equivalent to boast + -ful.

Etymology from Wiktionary, CC BY-SA 4.0.