The origin of the idiom "dull as dishwater" is not definitively known, but it emerged in the 19th century. It draws a comparison between dishwater, which is typically bland and lacking in interest or excitement, and something that is uninteresting, boring, or lacking in liveliness. The phrase is used to suggest a lack of stimulation, creativity, or engaging qualities, emphasizing a dullness that fails to capture attention or evoke enthusiasm.

영어로 "(as) dull as ditchwater"의 정의와 의미

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