wane

[1]	decrease , diminish , grow less , lessen , decline , die out , abate , ebb , subside , fade (away) , dim , taper off , peter out , wind down , weaken
[2]	draw to a close , decline , go down , end , terminate

[1]	ebb , ebbing
[2]	decrease , diminution , lessening , decline , abatement , ebb , subsidence , fading , tapering off , petering out , winding down , weakening , deterioration , degeneration
[3]	on the wane , on the decrease/decline/ebb , diminishing , decreasing , declining , abating , subsiding , fading , tapering off , petering out , winding down , weakening , deteriorating , degenerating