Adjective : a dependable employee.    From Dictionary.com. 

And sure enough, my intrinsic undependability bursts forth: I can't shake the notion that gender wasn't an issue until the Clinton campaign MADE it an issue!.    From Wordnik.com.  [Marc Kusnetz: Ephronology] Reference

Since the onset of the world crisis of capitalism, the fragility, uncertainty, undependability and instability of life has infected one an all, from Scandinavia to Greece, from the UK to Russia, making the poor more desperate and the rich increasingly greedy.    From Wordnik.com.  [Countercurrents.org] Reference

But the whole world does not admire our moral emptiness, our hedonism, the stupidity with which we destroy our core institutions in the name of transient fads, our undependability, and the cowardice of those who vote for war and then undercut their own troops so they can appear "peace-loving" at election time.    From Wordnik.com.  [HERE, THERE AND BACK AGAIN - A Townhall.com user blog] Reference