0 When the sea or tide ebbs, it moves away from the coast and falls to a lower level. -- bajar, refluir
1 If a physical or emotional feeling ebbs, it becomes less strong or disappears. -- decaer
2 the tide when it is moving away from the coast -- el reflujo
We’ll sail on the ebb.
3 (of the tide) to go out from the land -- bajar
4 to become less -- disminuir, decaer