Adjectives

(s)inactive(chemistry) not participating in a chemical reaction; chemically inert“desired amounts of inactive chlorine”
(a)inactive(pathology) not progressing or increasing; or progressing slowly
(a)nonoperational, inactive(military) not involved in military operations
(a)inactivenot exerting influence or change
(a)dormant, inactive(of e.g. volcanoes) not erupting and not extinct“a dormant volcano”
(a)passive, inactivelacking in energy or will“Much benevolence of the passive order may be traced to a disinclination to inflict pain upon oneself” (George Meredith)
(a)inactivelacking activity; lying idle or unused“an inactive mine”, “inactive accounts”, “inactive machinery”
(a)inactivenot engaged in full-time work“inactive reserve”, “an inactive member”
(a)inactivenot active physically or mentally“illness forced him to live an inactive life”, “dreamy and inactive by nature”
(s)inactive, motionless, static, stillnot in physical motion“She remained motionless, yet poised to take flight”