发浑(指清漆)

Dull \Dull\, v. t. [imp. & p. p. {Duller}; p. pr. & vb. n.
{Dulling}.]
1. To deprive of sharpness of edge or point. ``This . . .
dulled their swords.'' --Bacon.

Borrowing dulls the edge of husbandry. --Shak.

2. To make dull, stupid, or sluggish; to stupefy, as the
senses, the feelings, the perceptions, and the like.

Those [drugs] she has
Will stupefy and dull the sense a while. --Shak.

Use and custom have so dulled our eyes. --Trench.

3. To render dim or obscure; to sully; to tarnish. ``Dulls
the mirror.'' --Bacon.

4. To deprive of liveliness or activity; to render heavy; to
make inert; to depress; to weary; to sadden.

Attention of mind . . . wasted or dulled through
continuance. --Hooker.