Robert Beekes (with the assistance of Lucien van Beek). Etymological Dictionary of Greek. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill. Brill Online.
Den Danske Ordbog (online). Copenhagen: Det Danske Sprog- og Litteraturselskab: http://ordnet.dk/ddo
De Vries, Jan (1977). Altnordisches etymologisches Wörterbuch. 3rd ed. Leiden: Brill
Simpson, J., & Weiner, E. S. 1989. Oxford English dictionary. Oxford: Clarendon Press.
Robert Farren, PIE culture words collection, 2017
Any ancestors and descendants of the selected element are shown in the graph, but siblings and cousins are not.
The element in question is marked in green.
When the etymological tree is displayed in hierarchical style, the nodes can be repositioned manually only within their level.
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Left-click on a node or edge to show additional information and links. In some browsers, the graph may be savable as an image when right-clicking on it.
This map shows the etymological links in a geographic context.