inactiveness n 1: the state of being inactive [syn: {inaction}, {inactivity}, {inactiveness}] [ant: {action}, {activeness}, {activity}] 2: a disposition to remain inactive or inert; "he had to overcome his inertia and get back to work" [syn: {inactiveness}, {inactivity}, {inertia}] [ant: {activeness}, {activity}]