
Go to the expense of something/of doing something
Financial Commitment
Used when someone decides to spend a significant sum, for something they consider important.

They went to the expense of a designer kitchen.
Not Casual
Indicates a deliberate choice rather than a casual or necessary action.

He rarely goes to the expense of ordering dessert.
Implies Luxury
Often suggests an indulgence or luxury, not merely a practical decision.

She rarely goes to the expense of buying designer clothes.
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