Etymology
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vertigo (n.)
early 15c., from Latin vertigo "dizziness, sensation of whirling," originally "a whirling or spinning movement," from vertere "to turn" (from PIE root *wer- (2) "to turn, bend").
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vertiginous (adj.)
c. 1600, "of the nature of vertigo," from French vertigineux, from Latin vertiginosus "suffering from dizziness," from vertigo (see vertigo). From 1620s as "dizzy;" 1640s as "liable to cause dizziness." Related: Vertiginously.
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giddiness (n.)
late 13c., "thoughtless folly, flightiness," from giddy + -ness. Meaning "dizziness, vertigo" is from late 14c.
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