Fraternity
来自Big Physics
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Middle English: from Old French fraternite, from Latin fraternitas, from fraternus (see fraternal).
wiktionary
From Middle English fraternite, borrowed from Old French fraternité, from Latin frāternitās, ultimately from frāter(“brother”).
etymonline
fraternity (n.)
early 14c., "body of men associated by common interest," from Old French fraternité (12c.), from Latin fraternitatem (nominative fraternitas) "brotherhood," from fraternus "brotherly," from frater "brother," from PIE root *bhrater- "brother." Meaning "state or condition of being as brothers" is from late 15c. College Greek-letter organization sense is from 1777, first in reference to Phi Beta Kappa.
