The word 'buy' is correct and usable in written English. You can use it to talk about purchasing something, or in a figurative sense such as buying someone's story or argument. Example sentence: I decided to buy a new car last month.
I don't buy that".
"Can the government require you to buy a cell phone because that would facilitate responding when you need emergency services?
The legal argument focused on the challenge to core of the legislation – its requirement that almost all Americans buy health insurance.
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In the second day of hearings on Tuesday, the judges described the two-year-old law as fundamentally changing the relationship between the individual and the government, giving Congress virtually unlimited power to force people to buy products for their own good.
People would pay their taxes when they buy things and wouldn't need to worry about keeping records or filing tax returns at all.
Nick Hopkinson of Property Portfolio Rescue, which buys houses from distressed buy-to-let borrowers, describes the Nationwide's reported increase as a "statistical blip" which would "not fool anybody who is struggling to sell their home or obtain realistic mortgage finance in the real world".
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK