noun
the process of reheating and then cooling metal or glass to make it stronger
verb
to strengthen or harden by heating and then cooling
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The process of tempering steel involves heating and cooling it to achieve the desired strength and flexibility.
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My grandma always says that tempering chocolate is the key to making the perfect dessert.
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I'm still working on tempering my reaction when someone cuts me off in traffic.
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Sometimes life throws challenges at us as a way of tempering our character and resilience.