Lat. saxum n. ‘rock, boulder’ < PItal. *saks-o-: No certain etymology. Possibly cognate with Gm. words for 'knife': OIc. sax, OHG sahs 'knife' (MDV). Michiel de Vaan. "saxum" in: Etymological Dictionary of Latin and the other Italic Languages. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill, 2015. Brill Online. February 9, 2015. < http://iedo.brillonline.nl/dictionaries/lemma.html?id=14098 >
Robert Farren, PIE culture words collection, 2017
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