inert

(s) unable to move or resist motion
(s) having only a limited ability to react chemically; chemically inactive
- inert matter
- an indifferent chemical in a reaction
neutral, indifferent,
(s) slow and apathetic
- she was fat and inert
- a sluggish worker
- a mind grown torpid in old age
torpid, sluggish, soggy,

neutral indifferent torpid sluggish soggy

inept

inert gas inertia inertial inertial frame inertial guidance inertial guidance system inertial mass inertial navigation inertial navigation system inertial reference frame inertness