IPA: /ˈlaɪbələr/
KK: /ˈlaɪbələr/
A person who makes false statements about someone in writing, which can harm that person's reputation.
The journalist was sued for being a libeler after publishing untrue claims about the politician.
Libeler → It is formed from "libel" (from Latin *libellus*, meaning a little book or written document) and "-er" (meaning a person who). A libeler is a person who writes a defamatory statement in a written form.
Think of someone who writes a 'little book' ('libellus') to harm someone's reputation — that's why a libeler is a person who writes defamatory statements.