Tapaigh an Dies

hap-pi-ness (the definition)

–noun

1. the quality or state of being happy.

2. good fortune; pleasure; contentment; joy.

Origin:
1520–30; happy + -ness

—Synonyms
1, 2. pleasure, joy, exhilaration, bliss, contentedness, delight, enjoyment, satisfaction. Happiness, bliss, contentment, felicity  imply an active or passive state of pleasure or pleasurable satisfaction. Happiness  results from the possession or attainment of what one considers good: the happiness of visiting one’s family. Bliss  is unalloyed happiness or supreme delight: the bliss of perfect companionship. Contentment  is a peaceful kind of happiness in which one rests without desires, even though every wish may not have been gratified: contentment in one’s surroundings. Felicity  is a formal word for happiness of an especially fortunate or intense kind: to wish a young couple felicity in life.

—Antonyms
1.  misery.

(taken from dictionary.com)