Lat. culter -trī m. ‘knife; cutting part of a plough’ < PItal. *k(e/o)l-tro- 'knife' < PIE. *(s)kolh₂/3-tro- 'instrument for cleaving' Michiel de Vaan. "culter" in: Etymological Dictionary of Latin and the other Italic Languages. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill, 2014. Brill Online. October 2, 2014. < http://iedo.brillonline.nl/dictionaries/lemma.html?id=13054 >
Robert Farren, PIE culture words collection, 2017
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