The Collaborative International Dictionary
Unsuccessfulness
Unsuccessful \Un`suc*cess"ful\, a. Not successful; not producing the desired event; not fortunate; meeting with, or resulting in, failure; unlucky; unhappy. -- Un`suc*cess"ful*ly, adv. -- Un`suc*cess"ful*ness, n.
Wiktionary
unsuccessfulness
n. The state or condition of being unsuccessful.