1. (

• inert

) unable to move or resist motion ;

2. (

• inert ,
• indifferent ,
• neutral

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

3. (

• inert ,
• sluggish ,
• soggy ,
• torpid

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