Some examples:
Why am I so lethargic even after a good night's sleep?
Is that lizard less lethargic when it is in the hot desert sun?
She felt too lethargic to get out of bed and start her day.
I feel a little lethargic today.
Lethargic is a word that means tired, lazy sluggish, so antonyms of lethargic would be energetic and active.
After eating a huge, four course meal, i felt lethargic and bloated.
lethargic
lethargic
lethargic
Lethargic
Lethargic
After eating a large meal, I felt lethargic and had trouble staying awake during the meeting.
You will find a definition for lethargic in any dictionary. It means drowsy or sluggish. It is the adjectival form of the word lethargy.
lethargic