ebb

nouns

a gradual decline (in size or strength or power or number)

ebb, ebbing, wane

the outward flow of the tide

ebb, reflux

flow back or recede

"the tides ebbed at noon"

ebb, ebb away, ebb down, ebb off, ebb out

antonym

hem in fish with stakes and nets so as to prevent them from going back into the sea with the ebb

ebb

is a type of (narrower)

surround so as to force to give up

"The Turks besieged Vienna"

fall away or decline

"The patient's strength ebbed away"

ebb

is derived from

is a type of (narrower)

become faint or more distant

"the unhappy memories of her childhood receded as she grew older"