to one's cost

phrase

chiefly British

: from one's own bad experience

I found out to my cost that he was a liar.

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“To one's cost.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/to%20one%27s%20cost. Accessed 6 Mar. 2026.

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to one's cost

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