dizzy

Concise Oxford English Dictionary © 2008 Oxford University Press:
dizzy/ˈdɪzi/

▶adjective (dizzier, dizziest)

• 1 having a sensation of spinning around and losing one's balance.

• 2 informal (of a woman) silly.

▶verb (dizzies, dizzying, dizzied) (usu. as adj. dizzying) make (someone) feel unsteady, confused, or amazed: the dizzying rate of change.

– phrases
the dizzy heights informal a position of great importance.

– derivatives
dizzily adverb,
dizziness noun,
dizzyingly adverb.

– origin OE dysig ‘foolish’, of W. Gmc origin.