inert (
http://definr.com/inert)
adj 1: unable to move or resist motion
2: (chemistry) having only a limited ability to react
chemically; not active; "inert matter"; "an indifferent
chemical in a reaction" [syn:
indifferent,
neutral]
3: slow and apathetic; "she was fat and inert"; "a sluggish
worker"; "a mind grown torpid in old age" [syn:
sluggish,
torpid]