What is "gjenganger"

A Gjenganger ( Norwegian: Gjenganger/Gjenferd/Attergangar Danish: Genganger/Genfærd Swedish: Gengångare) is the term for a revenant, the spirit or ghost of a deceased from the grave, in Scandinavian folklore. Gjenganger has two parts, the prefix is related to "again" or "against", "towards" (gegenüber, gegen) and í gegn ('against'), from í ('in, on') and gegn ('straight, direct') and ganger which comes from a word meaning 'foot' or 'walker', thus it means "walking again" as in "walking after death". The form "attergangar" comes from atter meaning 'after' and originating from *afteraz meaning "of, away from" but adding the contrastive suffix *-teros, in essence meaning "after walking", "walking away from in contrast with close by", again imlying walking after death.