[adjective] not participating in a chemical reaction; "desired amounts of inactive chlorine"
[adjective] not progressing or increasing; or progressing slowly
[adjective] not active or exerting influence
[adjective] of e.g. volcanos; permanently inactive; "an extinct volcano" Synonyms:extinct
[adjective] of e.g. volcanos; temporarily inactive; "a dormant volcano" Synonyms:dormant
[adjective] lacking in energy or will; "Much benevolence of the passive order may be traced to a disinclination to inflict pain upon oneself"- George Meredith Synonyms:passive