Englishgiddy
adjective
1 she felt giddy with the sickly heat:
dizzy, lightheaded, faint, weak, weak at the knees, unsteady, shaky, wobbly, off balance;
reeling, staggering, tottering, teetering;
informal woozy, with legs like jelly, with rubbery legs;
rare vertiginous.
▷antonyms steady.
2 she was so young and giddy that she had no understanding of the problem:
flighty, silly, frivolous, skittish, irresponsible, flippant, whimsical, capricious, light-minded, featherbrained, scatterbrained;
careless, thoughtless, heedless, carefree, insouciant;
informal dippy, dopey, nutty;
British, informal dappy, batty, dotty, scatty;
North American, informal ditzy.
▷antonyms sensible.