Yes, mummify is in the scrabble dictionary

Mummify Definition

verb-transitive

To cause to shrivel and dry up.

To make into a mummy by embalming and drying.

verb-intransitive

To shrivel or dry up like a mummy.

verb

To embalm and dry as or as if a .

To make into or like a mummy.

To cause to dry up and shrivel.

To dry up and shrivel like a mummy.

(especially in ancient Egypt) preserve (a body) by embalming and wrapping it in cloth.

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