Regifting or regiving is the act of taking a gift that has been received and giving it to somebody else, sometimes in the guise of a new gift. One example of a formalization of this activity are the white elephant gift exchanges, in which items can be regifted from year to year.
权威例句
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In fact, I suspect that most people probably regift them.
WSJ: Houseguest Wine: Yes to Albari?o, No to Malbec | On Wine by Lettie Teague