sad - Wiktionary
(heading) Emotionally negative. Feeling sorrow; sorrowful, mournful. She gets sad when he's away. c. 1590–1592, William Shakespeare, “The Taming of the Shrew”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: Printed by Isaac Iaggard, and Ed[ward] Blount ...
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