An etymology by Julius Pokorny in "Indogermanisches Etymologisches Wörterbuch" says that "limes" comes from Indo-European "el-", "elei-", "lei-", "to bow", "to bend", "elbow". According to Pokorny, Latin "limen", "threshold", is related to "limes", being the stone over which one enters or leaves the house. Some scholars have viewed the frontier as a threshold. The Merriam–Webster dictionaries take this view, as does J. B. Hofmann in "Etymologisches Wörterbuch des Griechischen" under "leimon". "The White Latin Dictionary" denies any connection, deriving "limen" from *"ligmen", as in "lien" from *leig-, "tie". In this sense, the threshold ties together the doorway. W. Gebert also wrote an article discussing the term.