排水

Drain \Drain\ (dr[=a]n), v. t. [imp. & p. p. {Drained}
(dr[=a]nd); p. pr. & vb. n. {Draining}.] [AS. drehnigean to
drain, strain; perh. akin to E. draw.]
1. To draw off by degrees; to cause to flow gradually out or
off; hence, to cause the exhaustion of.

Fountains drain the water from the ground adjacent.
--Bacon.

But it was not alone that the he drained their
treasure and hampered their industry. --Motley.

2. To exhaust of liquid contents by drawing them off; to make
gradually dry or empty; to remove surface water, as from
streets, by gutters, etc.; to deprive of moisture; hence,
to exhaust; to empty of wealth, resources, or the like;
as, to drain a country of its specie.

Sinking waters, the firm land to drain,
Filled the capacious deep and formed the main.
--Roscommon.

3. To filter.

Salt water, drained through twenty vessels of earth,
hath become fresh. --Bacon.

drained \drained\ adj.
having lost much energy or emotion from vigorous activity; --
of people; as, the day's events left her completely drained
of strength.
[WordNet 1.5]

2. having resources completely depleted.

Syn: depleted.
[WordNet 1.5]

3. having no power remaining; -- of a battery.

Syn: run-down.
[WordNet 1.5]

{to go down the drain}

1. to be consumed in profitless activity; to be wasted; to
become worthless.

2. to vanish or cease existing.
[PJC]