unhappy
adj. A2 Elementary Oxford US //ənˈhæpi// UK //ʌnhˈæpi// un·hap·py
adj. feeling sad or not satisfied with a situation. You can also use it to describe something that is not lucky or successful.
adj. feeling or showing sadness, dissatisfaction, or discontent. It can also describe an unfortunate or unsuitable choice or event.
She was very unhappy about the news.
The customer was unhappy with the service and asked to speak with the manager.
Despite his professional success, he remained deeply unhappy in his personal life, feeling that his achievements were hollow without someone to share them with.
From Middle English unhappy; equivalent to un- + happy.
Usage
Typically used as a predicative adjective after 'be' or 'feel', or as an attributive adjective before a noun.