GIDDIEST
GIDDY
airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, lightheaded, silly
(adjective) lacking seriousness; given to frivolity; “a dizzy blonde”; “light-headed teenagers”; “silly giggles”
dizzy, giddy, woozy, vertiginous
(adjective) having or causing a whirling sensation; liable to falling; “had a dizzy spell”; “a dizzy pinnacle”; “had a headache and felt giddy”; “a giddy precipice”; “feeling woozy from the blow on his head”; “a vertiginous climb up the face of the cliff”
Source: WordNet® 3.1
Adjective
giddiest
superlative form of giddy: most giddy
Source: Wiktionary
GIDDY
Gid"dy, a. [Compar. Giddier; superl. Giddiest.] Etym: [OE. gidi mad,
silly, AS. gidig, of unknown origin, cf. Norw. gidda to shake,
tremble.]
1. Having in the head a sensation of whirling or reeling about;
having lost the power of preserving the balance of the body, and
therefore wavering and inclined to fall; lightheaded; dizzy.
By giddy head and staggering legs betrayed. Tate.
2. Promoting or inducing giddiness; as, a giddy height; a giddy
precipice. Prior.
Upon the giddy footing of the hatches. Shak.
3. Bewildering on account of rapid turning; running round with
celerity; gyratory; whirling.
The giddy motion of the whirling mill. Pope.
4. Characterized by inconstancy; unstable; changeable; fickle; wild;
thoughtless; heedless. "Giddy, foolish hours." Rowe. "Giddy chance."
Dryden.
Young heads are giddy and young hearts are warm. Cowper.
Gid"dy, v. i.
Definition: To reel; to whirl. Chapman.
Gid"dy, v. t.
Definition: To make dizzy or unsteady. [Obs.]
Source: Webster’s Unabridged Dictionary 1913 Edition