b, p, u, y are letters that make 'buy up'
buy, up are words within 'buy up'
1 possible definitions for 'buy up'
Under this definition, buy up is a verb and has the following properties:
take over, buy out have the same meaning as 'buy up'
'buy up' can be a type of buy, purchase.
buyout, takeover are derivatives of 'buy up'.