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English definition of “mellow”

mellow

verb [I] (BECOME SOFTER)    /ˈmel.əʊ/ US  /-oʊ/
to become softer and more developed in a pleasing way: The brickwork will mellow over the years so that it blends with the surroundings.Calming and relaxing
(Definition of mellow verb (BECOME SOFTER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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