v. 沉陷；退潮（ebb的现在分词）

[ noun ]
a gradual decline (in size or strength or power or number)
<noun.process>

Ebb \Ebb\, v. i. [imp. & p. p. {Ebbed}; p. pr. & vb. n.
{Ebbing}.] [AS. ebbian; akin to D. & G. ebben, Dan. ebbe. See
2d {Ebb}.]
1. To flow back; to return, as the water of a tide toward the
ocean; -- opposed to {flow}.

That Power who bids the ocean ebb and flow. --Pope.

2. To return or fall back from a better to a worse state; to
decline; to decay; to recede.

The hours of life ebb fast. --Blackmore.

Syn: To recede; retire; withdraw; decay; decrease; wane;
sink; lower.