Dissatisfaction

Part of speech: noun (n.)

The state of being dissatisfied, unsatisfied, or discontented; uneasiness proceeding from the want of gratification, or from disappointed wishes and expectations. The ambitious man has little happiness, but is subject to much uneasiness and dissatisfaction. Addison.

Synonyms: Discontent; discontentment; displeasure; disapprobation; distaste; dislike.