The origin of the idiom "blind alley" is uncertain, but it may be related to the idea of a street or alley that has no outlet or exit, forcing anyone who enters it to turn back. The phrase has been in use in English since the early 19th century, and it has been applied to a wide range of situations, including business ventures, relationships, and investigative efforts. In general, the phrase is used to describe a situation where there is no way forward, and further effort or investment is unlikely to produce any positive results.

What is the origin of the idiom "blind alley" and when to use it?

英語での「blind alley」の定義と意味

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