To swoop is to move or arc downward through the air rapidly, or to come in quickly and seize something, or to carry out an unexpected attack.(verb)
See swoop in Webster's New World College Dictionary
Origin: ME swopen < OE swapan, to sweep along, rush, akin to Ger schweifen, ON sveipa: see swift
See swoop in American Heritage Dictionary 4
verb swooped, swoop·ing, swoops verb, intransitive
Origin: Middle English swopen, to sweep along
Origin: , from Old English swāpan, to sweep, swing.
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