IPA: /lɪˈbɛl.ənt/
KK: /lɪˈbɛl ənt/
A person who files a legal complaint or lawsuit, particularly in a court of law, such as an ecclesiastical or admiralty court.
The libellant presented their case before the judge, seeking justice for the grievances stated in the complaint.
Libellant is derived from "libel" (from Latin "libellum", meaning a little book or formal written statement) and the suffix "-ant" (meaning one who). The term refers to one who files a formal written complaint or lawsuit, particularly in a legal context.
Think of someone who is filing a formal written complaint ('libel') — the '-ant' indicates that this person is the one taking action.