| reflux(drop, back, return, decrease, slow) |
| refluence(drop, back, return, decrease, slow) |
| decline(noun, back, decrease, slow, backward) |
| wane(noun, drop, decrease, retreat) |
| fall(decrease, deflation) |
| backflow(noun, drop, decrease, retreat, wane) |
| decay(noun, drop, decrease, retreat, wane) |
| decrease(noun, drop, retreat, wane) |
| diminution(noun, drop, decrease, retreat, wane) |
| dwindling(noun, drop, decrease, retreat, wane) |
| fading away(noun, expression, drop, decrease, retreat) |
| low water(noun, expression, drop, decrease, retreat) |
| outward flow(noun, expression, drop, decrease, retreat) |
| retroflux(noun, drop, decrease, retreat, wane) |
| sinking(noun, drop, decrease, retreat, wane) |
| subsidence(noun, drop, decrease, retreat, wane) |
| waning(noun, drop, decrease, retreat, wane) |
| aging(decrease, senescent) |
| ceasing to exist(expression, idiom, disappearance, windup) |
| contraction(decrease, deflation) |