Packing

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Middle English: from Middle Dutch, Middle Low German pak (noun), pakken (verb). The verb appears early in Anglo-Latin and Anglo-Norman French in connection with the wool trade; trade in English wool was chiefly with the Low Countries.

wiktionary

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From Middle English pakkyng; equivalent to pack(“verb and noun senses”) +‎ -ing.

etymonline

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packing (n.)

"any material used for filling an empty space," 1824, from pack (v.).