Merriam-Webster Collegiate Dictionary - inactive

 adjective  Date: 1664 not active: as  a.  (1) sedentary  (2) indolent, sluggish  b.  (1) being out of use  (2) relating to or being members of the armed forces who are not performing or available for military duties  (3) of a disease quiescent  c.  (1) chemically inert  (2) optically neutral in polarized light  d. biologically inert especially because of the loss of some quality (as infectivity or antigenicity)  • ~ly adverb  • inactivity noun Synonyms:  ~, idle, inert, passive, supine mean not engaged in work or activity. ~ applies to anyone or anything not in action or in operation or at work on ~ status as an astronaut ~ accounts. idle applies to persons that are not busy or occupied or to their powers or their implements workers were idle in the fields. inert as applied to things implies powerlessness to move or to affect other things; as applied to persons it suggests an inherent or habitual indisposition to activity inert ingredients in drugs an inert citizenry. passive implies immobility or lack of normally expected response to an external force or influence and often suggests deliberate submissiveness or self-control passive resistance. supine applies only to persons and commonly implies abjectness or indolence a supine willingness to play the fool.