Select the most appropriate ANTONYM of the underlined word in the context of its meaning in the given sentence.
She felt relieved and light after taking the headache medicine.

In the given context, light means feeling free from worry, pain, or affliction (weightless or unburdened). The exact opposite of this feeling is heavy, which denotes being weighed down by pain or distress.
Extinguish: Put an end to; blow out.

Ignorant: Lacking knowledge or awareness.

Dark: With little or no light.