2 adjectives to describe defamation

It is not pertinent to the present inquiry, but it may be stated as a mere matter of curious information, that this scandalous book, which is throughout a blasphemous defamation of our Saviour, proceeds to say, that he cunningly obtained a knowledge of the tetragrammaton from the Stone of Foundation, and by its mystical influence was enabled to perform his miracles.

"No balsam can heal the biting of a sycophant;" no thread can stitch up a good name torn by calumnious defamation; no soap is able to cleanse from the stains aspersed by a foul mouth.

2 adjectives to describe  defamation