a. 厚颜无耻的, 粗体字的

Bold-faced \Bold"-faced`\, a.
1. Somewhat impudent; lacking modesty; as, a bold-faced
woman.

I have seen enough to confute all the bold-faced
atheists of this age. --Bramhall.

2. (Print.) Having a conspicuous or heavy face; -- also
called {boldface}.

Note: This line is bold-faced nonpareil.

boldface \boldface\ n.
a typeface with thick heavy lines; -- also called
{bold-faced}.
[WordNet 1.5]