1. indolent
Why have you decided to rely on that indolent guy?
He was an indolent man, who lived only to eat, drink, and play at cards.
Salon wrote: “Hilton is the one everyone has come to see, and her indolent, dull coolness does not disappoint.”
2. listless
I feel listless and have a throbbing headache.
The heat made us all feel listless.
3. lethargic
I feel lethargic.
Nothing can make a person more lethargic than a big turkey dinner.
English word "lacking energy"(lethargic) occurs in sets:
English Basic Adjectives