lethargic - Dictionary definition and meaning for word lethargic
Sounds like alergic. When you have lack of interest in doing something i.e. alergy
lethargic sounds like leth(LOST)+argic(energy).....so you have LOST ALL YOUR ENERGY,THATS why you are feeling DULL AND DROWSY.
Let(Leg,LAAT) + har(haar) + gic(gayi) >>> legs ya laatein haar jane ke baad we get tired and loose energy to walk and get lazy and wanna go to bed as soon as possible..