Akademik

libeler
noun
one who attacks the reputation of another by slander or libel
Syn: ↑defamer, ↑maligner, ↑slanderer, ↑vilifier, ↑backbiter, ↑traducer
Derivationally related forms:
traduce (for: ↑traducer), ↑backbite (for: ↑backbiter), ↑libel, ↑vilify (for: ↑vilifier), ↑slander (for: ↑slanderer), ↑malign (for: ↑maligner), ↑defame (for: ↑defamer)
Hypernyms: ↑detractor, ↑disparager, ↑depreciator, ↑knocker

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/luy"beuh leuhr/, n.
a person who libels; a person who publishes a libel assailing another.
Also, esp. Brit., libeller.
[1580-90; LIBEL + -ER1]

Useful english dictionary. 2012.