Buy into means believe in an idea and support it: the staff bought into the idea of sharing equipment. I don't buy into that claim means 'I don't believe it.' With a company, the meaning is business: he bought into a publishing company, so he bought a share in it.
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buy into an idea / plan / belief; bought into
- The staff bought into the idea of sharing equipment.
- I don't buy into the claim that longer meetings mean better decisions.
- The investor bought into a small publishing company.
What changed
First versionThe team buyed into the new approach.
RevisionThe team bought into the new approach.
Buy is irregular, but the regular -ed rule makes buyed feel right. The past form is bought, and it stays the same in buy into: bought into the approach.
Fall for means believe something false, often a trick: he fell for the scam. Buy into means accept an idea, with no hint of a trick: the team bought into the new approach. In an argument, I don't buy it is a short 'I don't believe you', without into.
Your turn
Choose the past form: Most volunteers ___ into the plan after the discussion.
Show the answer
bought — Buy is irregular: buy, bought, bought. Buyed isn't an English form.
Describe an idea that you or your team came to believe in, even though you doubted it at first.
The neighbours bought into the idea of turning the empty lot into a shared garden.
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