harden one's heart
idiom
: to stop having kind or friendly feelings for someone or caring about something
She hardened her heart against him after their breakup.
All the discord hardened my heart to politics.
Cite this Entry
“Harden one's heart.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/harden%20one%27s%20heart. Accessed 28 May. 2025.
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Merriam-Webster unabridged
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