Definition of Asperse

Babylon English Dictionary
ridicule, slander, defame; sprinkle (as with holy water)
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Asperse Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
(v. t.)
To sprinkle, as water or dust, upon anybody or anything, or to besprinkle any one with a liquid or with dust.
  
(v. t.)
To bespatter with foul reports or false and injurious charges; to tarnish in point of reputation or good name; to slander or calumniate; as, to asperse a poet or his writings; to asperse a man's character.
  
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

asperse
\as*perse"\ (&?;), v. t. [imp. & p. p. aspersed (&?;); p. pr. & vb. n. aspersing.] [l. aspersus, p. p. of aspergere to scatter, sprinkle; ad + spargere to strew. see sparse.]
1. to sprinkle, as water or dust, upon anybody or anything, or to besprinkle any one with a liquid or with dust.
2. to bespatter with foul reports or false and injurious charges; to tarnish in point of reputation or good name; to slander or calumniate; as, to asperse a poet or his writings; to asperse a man's character. with blackest crimes aspersed.

JM Welsh <=> English Dictionary
Gwarthau = v. to asperse
Gwarthu = v. to asperse
The Devil's Dictionary
Asperse, (v.t.)

Maliciously to ascribe to another vicious actions which one has not had the temptation and opportunity to commit.
  
The Devil's Dictionary, by Ambrose Bierce, 1911 (About)
WordNet 2.0

Verb
1. charge falsely or with malicious intent; attack the good name and reputation of someone; "The journalists have defamed me!" "The article in the paper sullied my reputation"
(synonym) defame, slander, smirch, denigrate, calumniate, smear, sully, besmirch
(hypernym) charge, accuse
(hyponym) assassinate
(derivation) aspersion, slur
Asperse Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
To sprinkle, especially with holy water.