Low Tide at Shoreham Locks

Ebb and Flow are closely related to yesterday’s words, wax and wane. The moon, in conjunction with the sun, creates the tides in our oceans. When the tide is flowing, the waters are rising, and when it is ebbing the waters are falling. Between ebb and flow, we say that the tide is on the turn. The monthly greatest tidal ranges are called spring tides, and the smallest ranges are called neap tides.

Ebb can also be used metaphorically, often as regards failing health or energy. Flow is not used as a metaphor so much, as it has a second, concrete meaning referring to electrical or fluid currents on the move.