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Spend
Financial context
Use 'spend' when talking about money, implying a transfer of wealth for goods or services. 
Spend wisely
'Spend' can have a positive or negative connotation based on context, suggesting wise or reckless financial choices. 
Collocation nuance
Different collocations can imply various intentions, like 'spend money' (generic) versus 'spend a fortune' (large amount). 