lethargic

lethargic
le‧thar‧gic /ləˈθɑːdʒɪk, lɪˈθɑːdʒɪk $ -ˈθɑːr-/ adjectivefeeling as if you have no energy and no interest in doing anything
   SYN  lazy
   OPP  energetic:
    The hot weather was making us all lethargic.
—lethargically /-kli/ adverb
     

THESAURUS

   ▪ slow not moving quickly or not doing something quickly: I was always one of the slowest runners in my class. | My computer’s really slow compared to the ones at school.
   ▪ gradual happening, developing, or changing slowly over a long period of time: a gradual rise in the Earth’s temperature | I’ve noticed a gradual improvement in his work.
   ▪ leisurely especially written moving or doing something slowly, especially because you are enjoying what you are doing and do not have to hurry: a leisurely breakfast | They walked at a leisurely pace.
   ▪ unhurried especially written moving or doing something in a slow and calm way, without rushing at all: She continued to listen, seeming relaxed and unhurried. | the doctor’s calm unhurried manner
   ▪ sluggish moving or reacting more slowly than usual, especially because of a loss of power or energy. Also used when business, sales, or the economy seem very slow: The car seems rather sluggish going uphill. | The drink was making her sluggish. | the company’s sluggish performance this year | Sales have been sluggish.
   ▪ lethargic moving slowly, because you feel as if you have no energy and no interest in doing anything: She woke up feeling heavy and lethargic. | His son seemed depressed and lethargic.
   ▪ languid literary slow and with very little energy or activity – used about people, actions, or periods of time: She lifted her hand in a languid wave. | a long languid afternoon in the middle of summer | He was pale and had rather a languid air about him.
   ▪ glacial literary extremely slow – used especially about the speed at which something happens: Things are changing, but at a glacial pace.