His passivity in the face of injustice was concerning to his friends.

I cannot believe the bystander's passivity in this bullying situation. *passivity means uninvolved and not active*

The word 'passivity' is a verb. An example of a sentence using the word would be: The passivity of the teacher led to a very rowdy class.

The cast of Passivity - 2005 includes: Wayne Lamont Sims as Chad

lack of interest, indifference, inertia, coolness, passivity, nonchalance, torpor, unconcern