Meaning

adjective experiencing or showing sorrow or unhappiness; ; - Christina Rossetti

adjective of things that make you feel sad; ; ; ; - Christina Rossetti

adjective bad; unfortunate

originFrom Middle English sad, from Old English sæd (“satisfied, full, sated, unable to handle more, weary”), from Proto-West Germanic *sad, from Proto-Germanic *sadaz (“sated, satisfied”), from Proto-Indo-European *seh₂- (“to satiate, satisfy”). Cognate to Saterland Frisian sääd, West Frisian sêd, Dutch zat, German Low German satt, German satt. The interjection sense is a reference to frequent usage…

Etymology from Wiktionary, CC BY-SA 3.0