Answer:

drooped

AnswerCrossword Clue
DROOPEDHung down
DROOPEDShowed sadness, as a dog's ears
DROOPEDLost vitality
DROOPEDWasn't taut
DROOPEDLanguished.
DROOPEDSank down.
DROOPEDFlagged
DROOPEDBecame depressed
DROOPEDLanguished
DROOPEDWilted
DROOPEDWasn't stiff
DROOPEDSlumped