cost (someone) dearly

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cost (someone) dearly

To cause dire, harmful, or problematic consequences for someone, especially regarding a foolish action or a mistake. Drinking all night before his final exams is going to cost him dearly. That late penalty could cost them dearly, as it now puts their opponents within range to tie the game.
See also: cost, dearly
References in periodicals archive ?
With this vital information, they can get all sorts of other data and it can cost you dearly.
Although HSBC won't charge if you get any payments bounced, it could still cost you dearly.
It is important not to make any mistakes because they can cost you dearly.
The right broker saves you time and money, while the wrong one can cost you dearly.
Cutting costs on your insurance could cost you dearly when on the slopes.
No one's going to tell you he or she needs to cut corners in order to come in with a competitive bid, though it may cost you dearly in the future.
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