lighten
verb
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alleviate or remove (pressure or stress) or make less oppressiverelieve
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become lighter“The room lightened up”lighten up
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make lighter or brighterlight
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to become more cheerful“After a glass of wine, they lightened up a bit.”lighten upbuoy up
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reduce the weight on
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make more cheerful“the conversation lightened me up a bit”lighten upbuoy up