n.

1. 颜料[C][U]
   an artificial pigment

   人造颜料

2. 【生】色素[U]

vt.

1. 给……着色，染

vi.

1. 呈现颜色

n.

1. the natural colouring matter of animal or plant tissue.
2. a substance used for colouring or painting, especially a dry powder which constitutes a paint or ink when mixed with oil or water.

v.