n. The state or character of being precarious; uncertainty; dependence on the will or pleasure of others, or on unknown events: as, the precariousness of life or health.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. extreme dangerousness
n. being unsettled or in doubt or dependent on chance
Word Usage
"And yet I have been at pains not to conceal the facts that those things I have instanced have a certain precariousness of tenure."