SADNESS
gloominess, lugubriousness, sadness
(noun) the quality of excessive mournfulness and uncheerfulness
sadness, unhappiness
(noun) emotions experienced when not in a state of well-being
sadness, sorrow, sorrowfulness
(noun) the state of being sad; “she tired of his perpetual sadness”
Source: WordNet® 3.1
Etymology
Noun
sadness (countable and uncountable, plural sadnesses)
(uncountable) The state or emotion of being sad.
Synonyms: forlornness, melancholy
(countable) An event in one's life that causes sadness.
Synonyms: misfortune, woe
Source: Wiktionary
Sad"ness, n.
1. Heaviness; firmness. [Obs.]
2. Seriousness; gravity; discretion. [Obs.]
Her sadness and her benignity. Chaucer.
3. Quality of being sad, or unhappy; gloominess; sorrowfulness;
dejection.
Dim sadness did not spare That time celestial visages. Milton.
Syn.
– Sorrow; heaviness; dejection. See Grief.
Source: Webster’s Unabridged Dictionary 1913 Edition