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square[square 词源字典]

square: [13] Etymologically a square is a ‘four’- sided figure. The word comes via Old French esquare or esqire (squire was the Middle English form of square) from Vulgar Latin *exquadra, a derivative of *exquadrāre ‘square’. This was a compound verb formed from the intensive prefix ex- and Latin quadrāre ‘square’, a derivative of the Latin stem quat-, quad- ‘four’, from which English gets quadrant, quarantine, quarter, etc, as well as cadre, and, via Italian, squad and squadron. The use of the adjective square for ‘stuffy, old-fashioned’ originated in jazz circles in the USA in the 1940s.
=> cadre, quadrant, quarter, squadron[square etymology, square origin, 英语词源]