PGm. *arut- m. ‘ore’ < proto-form. *arud-. Etymology disputed: "likely to be of non-IE origin in view of the alternation of Pre-Gm. *arud- with Lat. raud- and the similarities with Sum. urud(u) 'copper'." (GK); but derived from IE *h₁reudh- 'red' according to MA. Guus Kroonen. "arut-" in: Etymological Dictionary of Proto-Germanic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill, 2014. Brill Online. November 25, 2014. < http://iedo.brillonline.nl.ludwig.lub.lu.se/dictionaries/lemma.html?id=20527 >
Robert Farren, PIE culture words collection, 2017
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