vt.

1. （鸟）用喙理（毛）；精心打扮（自己）

vi.

1. （鸟）用喙理毛；（人）精心打扮自己
2. 洋洋自得

v.

1. (of a bird) tidy and clean its feathers with its beak.
2. (of a person) devote effort to making oneself look attractive.
3. (preen oneself) congratulate or pride oneself.