light-headed

• lightheaded

From light (“lacking weight or mental gravity”, adjective) +‎ headed (“having a head”, adjective).

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light-headed (comparative lighter-headed or more light-headed, superlative lightest-headed or most light-headed)

1. Dizzy or feeling faint, usually as a result of a drop in blood pressure to the brain; delirious.
2. (figuratively) Thoughtless; volatile; frivolous.

• (dizzy): giddy
• (thoughtless): heedless, unsteady, fickle, unaware, inattentive, careless, silly

• lighthearted

• headlighted