Sorrowful, unhappy (3)
I believe the answer is:
sad
I believe this clue is a double definition.
'sorrowful' is the first definition.
(associated in meaning)
'unhappy' is the second definition.
(associated in meaning)
(Other definitions for sad that I've seen before include "Unfortunate" , "Melancholy, depressed" , "Sorrowful, unhappy" , "Mournful - sorry" , "Disconsolate" .)