unhappy Definition

unhappy
adj

1. Sad; in low spirits; miserable.

Thesaurus: sad, dejected, despondent, miserable, wretched, crestfallen, downcast, depressed; Antonym: cheerful.
2. Bringing sadness; unfortunate.

Example: an unhappy ending to the film
3. Inappropriate; infelicitous.

Example: an unhappy choice of words

Derivative: unhappily

In an unhappy way; sadly or miserably.

Unfortunately; regrettably.

Unsuccessfully.

Derivative: unhappiness
noun

The state of being sad or miserable
Thesaurus: sadness, sorrow, woe, melancholy, misery, blues (slang), dumps (slang).

Etymology: 14c.