Years of disappointment hardened his heart against new friendships.
harden someone's heart
idiomTo make someone more resistant to something.
The constant betrayal by his business partners eventually hardened his heart, making him suspicious of everyone he met.
The relentless cruelty of the war had hardened his heart, leaving him unable to feel the empathy he once possessed for his fellow soldiers.
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absence makes the heart grow fonder
One feels more love or affection for those one loves when parted from them.
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all heart
Motivated by positive emotions, especially as productive of exceptionally generous or kind behavior.
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another nail in someone's coffin
An event that increases the likelihood of or causes further failure.
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answer someone's prayers
To be or do exactly what someone has been wishing or asking for.
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answer to someone's prayers
Exactly what someone has been wishing or asking for.
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apple of someone's eye
The object of somebody's affections; a person (or sometimes a thing) that someone strongly prefers; a favorite, a loved one.
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bane of someone's existence
Someone or something that poses a significant problem to someone.
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bash someone's face in
To beat someone violently.