ETYMOLOGY
from Latin impudicus (shameless, unchaste) + -ous
EXAMPLE
“… To the first, though the Libertines boast, that what is sinne in others, is not in them; and the Popish Canonists tell us, that though it may be a wanton and impudicous act in another to kiss a woman, yet a Priest doing it, it is to be presumed he doth it onely to bless her; yet we think it abominable to have such divers Weights, and divers Measures; …”
From: Coena quasi Κοινὴ: The new-inclosures broken down, and the Lords Supper laid forth in common for all Church-members
By William Morice, 1657
Lexicophilia 