To wrap something up in a covering is to envelop it (pronounced “enVELLup” ). The specific wrapping you put around a letter is an envelope (pronounced variously, but with the accent on the first syllable).
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To wrap something up in a covering is to envelop it (pronounced “enVELLup” ). The specific wrapping you put around a letter is an envelope (pronounced variously, but with the accent on the first syllable).
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