Noun has 2 senses

• inactiveness(n = noun.state) inaction, inactivity - the state of being inactive;


Antonym: activeness
Derived form adjective inactive₅, adjective inactive₇

• inactiveness(n = noun.attribute) inactivity, inertia - a disposition to remain inactive or inert; "he had to overcome his inertia and get back to work"


Antonym: activeness
Derived form adjective inactive₆, adjective inactive₉