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flight [flight 词源字典]: flight: [OE] English has two distinct, etymologically unrelated words flight. One, ‘flying’, comes from a prehistoric West Germanic *flukhtiz, a derivative of the same base as produced fly (the sense ‘series of stairs’, which developed in the 18th century, was perhaps modelled on French volée d’escalier, literally ‘flight of stairs’). The other, ‘escape’, comes from a hypothetical Old English *flyht, never actually recorded, which goes back ultimately to the same Germanic base as produced flee.
=> flee, fly[flight etymology, flight origin, 英语词源]
scale (v.1): "to climb by or as by a ladder," late 14c., from scale (n.) "a ladder," from Latin scala "ladder, flight of stairs," from *scansla, from stem of scandere "to climb" (see scan (v.)). Related: Scaled; scaling.