Translation of lethargic in Spanish

I'm very interested in learning languages. I'm learning English,German and french as well as Japanese. My native language is Spanish. Yes is very nice living here. What do you think about the Mexican people?
After ten minutes and after drinking a bottle of water we returned to our place. It was already three in the morning. We were unhappy to miss a great party, but our physical conditions were bad.
At Pisac we visited its 'once certainly authentic', 'today completely touristic' market. We enjoyed it anyway, ate fresh corncobs and bought a warm wool hat.