Answer:

EBBED

AnswerCrossword Clue
EBBEDEased up
EBBEDDropped off
EBBEDDwindled
EBBEDDeclined
EBBEDWanned
EBBEDUnderwent recession
EBBEDReceded
EBBEDWent out
EBBEDReceded, as the tide
EBBEDDiminished
EBBEDFell off
EBBEDWaned
EBBEDSubsided
EBBEDDrew away
EBBEDBacked away from the shore
EBBEDDwindled away
EBBEDGradually declined
EBBEDWent out, as the tide
EBBEDDied down
EBBEDSlipped away
EBBEDFlowed back
EBBEDWent back
EBBEDPetered out
EBBEDFell back
EBBEDTapered off
EBBEDFell away
EBBEDLet up
EBBEDDrew away from shore
EBBEDSlacked off
EBBEDFaded away
EBBEDFlagged
EBBEDDeclined.
EBBEDReceded.
EBBEDWaned.
EBBEDDiminished.
EBBEDRan out.
EBBEDAbated.
EBBEDSubsided.
EBBEDSlackened.
EBBEDFell gradually.