Definition of "Inactive" :

adjective: not active physically or mentally

"Illness forced him to live an inactive life."

adjective: not engaged in full-time work

"Inactive reserve."

adjective: lacking activity; lying idle or unused

"An inactive mine."

adjective: (pathology) not progressing or increasing; or progressing slowly

adjective: lacking in energy or will

adjective: (of e.g. volcanos) not erupting and not extinct

adjective: not exerting influence or change

adjective: not in physical motion

adjective: (military) not involved in military operations

adjective: (chemistry) not participating in a chemical reaction; chemically inert

"Desired amounts of inactive chlorine."