Is it possible that "one who studies a society's waste materials" could be a "garbagegist" and if so what a ridiculous description, and if not the missing letters in the clue are - ? ?rb??gist - to complete the clue. Also what is the word for "undergo the gradual breaking down of a cell"?
Lysis - The dissolution or destruction of cells, such as blood cells or bacteria, as by the action of a specific lysin that disrupts the cell membrane.