Alternative form of saad (“Arabic letter”)
"After months of feeling SAD, she finally saw a doctor to address her lack of sunlight."
Initialism of seasonal affective disorder.
"She felt a deep sad at the thought of leaving her hometown."
To make melancholy; to sadden or grieve (someone).
"The news of her passing deeply saddened him, leaving a heavy silence in the room."
"The little bird sat sad in the empty nest all day."
Usage: Sad functions as an archaic verb meaning to cause grief, but it is rarely used in modern English where the noun form sadnesse was historically paired with it. Instead of using this obsolete construction, simply use verbs like sicken, distress, or make someone feel sorrowful for contemporary clarity.
experiencing or showing sorrow or unhappiness
"feeling sad because his dog had died"
"Better by far that you should forget and smile / Than that you should remember and be sad"
of things that make you feel sad
"sad news"
"she doesn't like sad movies"
"it was a very sad story"
"When I am dead, my dearest, / Sing no sad songs for me"
bad; unfortunate
"my finances were in a deplorable state"
"a lamentable decision"
"her clothes were in sad shape"
"a sorry state of affairs"
Emotionally negative.
"She felt sad after hearing the bad news about her friend's accident."
Feeling sorrow; sorrowful, mournful.
"The rain tapped against the window as she sat alone, feeling a deep sadness that made her eyes sting."
In plain English: Sad means feeling really unhappy or down about something.
"She felt sad when her favorite team lost the game."
The word "sad" comes from Old English sæd, which originally meant "satisfied," "full," or "weary." Over time, the sense of being overwhelmed by sorrow shifted into its modern meaning in Middle English.