Disgruntled
/dɪˈsɡrʌntəld/
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Definition
(adj) In a dissatisfied, frustrated, or upset mood; in a bad temper or ill humour.
Sentence Examples
"I'd rather get the sack than not join the labour union," said the disgruntled worker.
We think a disgruntled employee was the one who planted the bomb.
CEFR Practice Quiz
The ____ employee quit his job after his request for a raise was denied by the company.