Slacked off
Else clues• Abated
• Abated, as a tide
• Backed away from the shore
• Declined
• Decreased
• Died down
• Diminished
• Drew away
• Drew away from shore
• Drew back
• Drew back, as the tide
• Dropped off
• Dwindled
• Dwindled away
• Eased off
• Eased up
• Faded away
• Fell away
• Fell back
• Fell off
• Flagged
• Flowed away
• Flowed back
• Flowed back, as the tide
• Flowed out
• Gradually declined
• Lessened
• Let up
• Petered out
• Receded
• Receded, as the tide
• Receded, like a tide
• Slackened
• Slipped away
• Subsided
• Tapered off
• Underwent recession
• Waned
• Went back
• Went out
• Went out with the waves
• Went out, as the tide
• Went to a lower level