Gr. ϑέρος n. 'summer heat; summer; harvest, crop' < IE *gʷher-os 'warmth' Hrach K. Martirosyan. "ǰer" in: Etymological Dictionary of the Armenian Inherited Lexicon. Indo-European Etymological Dictionaries Online. Edited by Alexander Lubotsky. Brill, 2014. Brill Online. November 3, 2014. < http://iedo.brillonline.nl/dictionaries/lemma.html?id=799 >
Robert Farren, PIE culture words collection, 2017
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