undig means to undo the process of digging; to fill up (a hole or grave) or bury again (something unearthed). Lexicurio rates it Sui generis — a strength score of 87 out of 100.
verb
- To undo the process of digging; to fill up (a hole or grave) or bury again (something unearthed).“1824-1832, Mary Russell Mitford, Our Village
Tom Cordery dead! the words seem almost a contradiction. One is tempted to send for the sexton and the undertaker, to undig the grave, to force open the coffin-lid — there must he some mistake.”