inert

Adjective

• slow and apathetic
  • she was fat and inert
    
  • a sluggish worker
    
  • a mind grown torpid in old age
    

• having only a limited ability to react chemically; chemically inactive
  • inert matter
    
  • an indifferent chemical in a reaction
    

• unable to move or resist motion

Related words

• Synonyms: 
  sluggish , soggy , torpid , indifferent , neutral