n. 潜水人, 潜水鸟, 养鸭者

Ducker \Duck"er\, n.
1. One who, or that which, ducks; a plunger; a diver.

2. A cringing, servile person; a fawner.

Doucker \Douck"er\, n. [From aouck, for duck. See {Duck}, v. t.]
(Zo["o]l.)
A grebe or diver; -- applied also to the golden-eye, pochard,
scoter, and other ducks. [Written also {ducker}.] [Prov.
Eng.]