lightheadedness

nouns

a reeling sensation; a feeling that you are about to fall
dizziness, giddiness, lightheadedness, vertigo
is derived from
lightheaded
a frivolous lack of prudence
lightheadedness
is derived from
lightheaded
is a type of (narrower)
the trait of acting rashly and without prudence
heedlessness, mindlessness, rashness