happiness -
emotions experienced when in a state of well-being
unhappiness,
sadness state characterized by emotions ranging from mild discontentment to deep grief
happy well expressed and to the point; "a happy turn of phrase"; "a few well-chosen words"
unhappy experiencing or marked by or causing sadness or sorrow or discontent; "unhappy over her departure"; "unhappy with her raise"; "after the argument they lapsed into an unhappy silence"; "had an unhappy time at school"; "the unhappy (or sad) news"; "he looks so sad"
feeling the experiencing of affective and emotional states; "she had a feeling of euphoria"; "he had terrible feelings of guilt"; "I disliked him and the feeling was mutual"
unhappiness state characterized by emotions ranging from mild discontentment to deep grief
happy well expressed and to the point; "a happy turn of phrase"; "a few well-chosen words"
unhappy experiencing or marked by or causing sadness or sorrow or discontent; "unhappy over her departure"; "unhappy with her raise"; "after the argument they lapsed into an unhappy silence"; "had an unhappy time at school"; "the unhappy (or sad) news"; "he looks so sad"
emotional state,
spirit the state of a person's emotions (especially with regard to pleasure or dejection); "his emotional state depended on her opinion"; "he was in good spirits"; "his spirit rose"
happiness -
Fortuitous elegance; unstudied grace; — used especially of language.
Wikipedia
Happiness is a state of mind or feeling characterized by contentment, love, satisfaction, pleasure, or joy. A variety of biological, psychological, religious, and philosophical approaches have striven to define happiness and identify its sources. While direct measurement of happiness presents challenges, tools such as The Oxford Happiness Questionnaire have been developed by researchers.
OmegaWiki Dictionary
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happiness Emotions experienced when in a state of well-being.