"Old name of the wheel, preserved in several languages... from reduplicated IE *kʷe-kʷl-o-...The word is derived from the root *kʷel(H)- 'turn'... Given that the meaning 'wheel' (> 'wagon') is represented almost everywhere, one may wonder if the meaning 'circle' is secondary." (RB).
Guus Kroonen. Etymological Dictionary of Proto-Germanic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill. Brill Online.
De Vries, Jan (1977). Altnordisches etymologisches Wörterbuch. 3rd ed. Leiden: Brill
Robert Farren, PIE culture words collection, 2017
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