English

buy into

To believe (something, especially something implausible); to accept (a craze, fad, or notion) as valid.

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    Origin

    From buy + into.

    From Wiktionary, CC BY-SA 4.0.

    Lineage

    • partEnglishbuy “To obtain (something) in exchange for money or goods.”
      • inheritedMiddle Englishbyen
        • inheritedOld Englishbycġan “to buy, pay for, acquire, redeem, ransom, procure, get done, sell”
    • partEnglishinto “To or towards the inside of.”
      • inheritedMiddle Englishin-to
        • inheritedOld Englishintō

    Sources