Etymology

costful

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Today it means: Expensive; sumptuous. Full definition →

Middle English costful
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The story

  1. Middle English · inherited fromcostful
  2. English todaycostful

From Middle English costful, equivalent to cost + -ful. Perhaps influenced by Middle English costful (“fraught with hardship”), a different word.

Etymology from Wiktionary, CC BY-SA 4.0.