From Middle English sad, from Old English sæd (“sated, full”), from Proto-Germanic *sadaz (“sated, satisfied”), from Proto-Indo-European *seh₂- (“to satiate, satisfy”).
sad (comparative sadder or more sad, superlative saddest or most sad)
- (heading) Emotionally negative.
- Feeling sorrow; sorrowful, mournful.
- Appearing sorrowful.
- Causing sorrow; lamentable.
- Poor in quality, bad; shameful, deplorable; later, regrettable, poor.
- Of colours: dark, deep; later, sombre, dull.
- (obsolete) Sated, having had one's fill; satisfied, weary.
- (obsolete) Steadfast, valiant.
- (obsolete) Dignified, serious, grave.
- (obsolete) Naughty; troublesome; wicked.
- (slang) Unfashionable; socially inadequate or undesirable.
- (dialectal) Soggy (to refer to pastries).
- (obsolete) Heavy; weighty; ponderous; close; hard.
sad (plural sads)
- Alternative form of saad (“Arabic letter”)