dejected vs unhappy

dejected and unhappy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
dejected	No	Yes	No	No
unhappy	No	Yes	No	No

dejected (adjective)	unhappy (adjective)
affected or marked by low spirits	experiencing or marked by or causing sadness or sorrow or discontent
	generalized feeling of distress
	marked by or producing unhappiness
	causing discomfort