This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A person whose profession is to prepare the body of a deceased person and place it in a coffin, especially in a ceremonial or ritualistic manner.

"He finds a job as an "encoffiner," one who conducts the ritual of preparing a dead body for burial, but fails to tell his wife precisely what he is doing because he fears her disapproval."

encoffin    encoffinment