Noun
unfulfillment (usually uncountable, plural unfulfillments)
The failure to fulfill or perform something.
Synonyms: neglection, dissatisfaction
Antonyms: fulfillment, execution, consummation
Failures plagued me. Things I had omitted or ignored, neglected. What I should have given and hadn't. I felt the biting pang of every unfulfillment. Richard Matheson
Hell is the opposite of joy. It is unfulfillment. It is knowing Who and What You Are, and failing to experience that. It is being less. Neale Donald Walsch