Answer: sapped

AnswerCrossword Clue
SAPPEDDrained
SAPPEDUndermined
SAPPEDExhausted, as one's strength
SAPPEDTuckered out
SAPPEDExhausted
SAPPEDDevitalized
SAPPEDWeakened
SAPPEDMade weak
SAPPEDDrained of energy
SAPPEDEnervated
SAPPEDDepleted
SAPPEDWiped out
sappedSAP, to deprive of strength
sappedDrain someone of (strength or power)
sappedGradually weaken or destroy (a person's strength or power)