A feeling of being unhappy or unsatisfied with something.
“I am writing to express my dissatisfaction with the quality of the furniture I purchased.”
“My dissatisfaction stems from the repeated delays in processing my application.”
This noun is central to complaint-style CELPIP Writing Task 1 emails, often following 'express my' as in 'express my dissatisfaction with...'. Using precise nouns like this instead of simple phrases like 'I am not happy' demonstrates a wider vocabulary range, which raises your score.
Synonyms: displeasure, discontent, disappointment