General unhappiness:
* Malheureux/malheureuse: This is the most direct translation of "unhappy" and can be used in most situations.
* Triste: This means "sad" and can be used to express a milder form of unhappiness.
* Déprimé(e): This means "depressed" and indicates a more intense feeling of unhappiness.
Specific types of unhappiness:
* Mécontent(e): This means "dissatisfied" and implies unhappiness with a specific situation or person.
* Déçu(e): This means "disappointed" and expresses unhappiness due to something not meeting expectations.
* Fâché(e): This means "angry" and can be used to express unhappiness due to anger or frustration.
Other options:
* Insatisfait(e): This means "unsatisfied" and can be used to express a general lack of happiness.
* Défavorable: This is more formal and means "unfavorable" or "unpleasant."
The best way to choose the right word depends on the context and the intensity of the unhappiness you want to express.