sleepy, slow and lacking energy
सुस्त, आलसी
Usage
I always feel lethargic after a heavy lunch.
The heat made the players slow and lethargic.
Common mistake
He was in a lethargic after the fever.
He was in a state of lethargy after the fever.
Lethargic is an adjective; the noun is lethargy.
Remember: Lethargic: no energy, like a sleepy cat.