Lat. līra f. ‘furrow’ < PItal. *loisā- < PIE. *lois-h₂- 'furrow, track'. Some derivations: dēlīrus 'insane', dēlīrāre v. 'to be mad; deviate from the balks (in ploughing'), dēlīritās 'insanity', dēlīrāmentum 'nonsense'. /possibly O. luisarifs [abl.pl.f.] month-name ('in which the furrows are drawn'?)./OPr. lyso 'field bed', OCS. lěxa 'field bed, furrow'; OHG. leisa 'track'./Lat. dē-līrus probably developed from *dē līrād (īre) '(to go) off the track'. Michiel de Vaan. "līra" in: Etymological Dictionary of Latin and the other Italic Languages. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill, 2014. Brill Online. November 3, 2014. < http://iedo.brillonline.nl/dictionaries/lemma.html?id=13569 >
Robert Farren, PIE culture words collection, 2017
[Farren (2017)]
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