From The Collaborative International Dictionary of English v.0.48:
Scoundrel \Scoun"drel\, n. [Probably from Prov. E. & Scotch
scunner, scouner, to loathe, to disgust, akin to AS. scunian
to shun. See Shun.]
A mean, worthless fellow; a rascal; a villain; a man without
honor or virtue.
[1913 Webster]
Go, if your ancient, but ignoble blood
Has crept through scoundrels ever since the flood.
--Pope.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Scoundrel \Scoun"drel\, a.
Low; base; mean; unprincipled.
[1913 Webster]