meaning uncertain, has been interpreted as 'silver mine'. "There is some inconclusive evidence that Celtiberian also had another word for 'silver', silapur (Botorrita I), which is probably a Wanderwort of unknown origin, identical to Go. silubr, OCS sьrebro and Lith. sidãbras" (RM).
Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill. Brill Online: http://iedo.brillonline.nl.ludwig.lub.lu.se/dictionaries/content/proto-celtic/index.html
Robert Farren, PIE culture words collection, 2017
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