- inert - unable to move or resist motion
Antonym: moving (indirect, via nonmoving)
- inert, indifferent, neutral - having only a limited ability to react chemically; not active; "inert matter"; "an indifferent chemical in a reaction"
Antonym: reactive (indirect, via unreactive)
- inert, sluggish, torpid - slow and apathetic; "she was fat and inert"; "a sluggish worker"; "a mind grown torpid in old age"
Antonym: active (indirect, via inactive)