Definition
A prævaricator (also rendered prævaricator or prevaricator in historical sources) is, in Roman civil law, an advocate or legal representative who secretly colludes with the opposing party to betray the client whose cause he has been retained to prosecute or defend. The term denotes a species of professional treachery: the attorney outwardly appears to represent one party while covertly assisting the other. The conduct is not mere incompetence or negligence — it is intentional betrayal of trust under the cover of representation.
In the civil law tradition, the prævaricator was subject to formal legal sanction. The Digest (47.15.1) addresses the offense specifically, treating it as a distinct wrong cognizable under Roman law.
Common Language
Modern common usage (Wiktionary): A prevaricator is a person who speaks evasively or misleadingly; one who equivocates or lies by indirection.
Historical common usage (Webster's 1913): One who prevaricates; one who deviates from the truth or evades giving a direct answer.
The gap here is significant. In ordinary English — both modern and nineteenth-century — a prevaricator is simply a liar or equivocator. In civil law, the term carries a sharply specific meaning: not mere dishonesty in speech, but calculated professional betrayal of a client by the very advocate engaged to represent them. A researcher encountering "prævaricator" in a legal source must not read it as a synonym for liar — the legal offense involves breach of fiduciary duty and collusion, not merely false or evasive statements.
Common Confusion
The ordinary English word "prevaricator" and the civil law term "prævaricator" look and sound identical but describe materially different conduct. Historical legal sources — particularly those influenced by civil law — use the term in its technical sense. Common law sources, if they use the word at all, may use it loosely to mean a witness or party who evades the truth. Context and the underlying legal tradition must govern interpretation.
Why It Matters in Research
This term appears almost exclusively in civil law contexts and in English legal sources that drew on the civil law tradition, particularly ecclesiastical courts, admiralty, and Scots law. Researchers working in common law sources from English or American jurisdictions will rarely encounter it as a term of art, though it may appear in treatises discussing Roman law or comparative legal history.
The key research trap is the semantic drift noted above: a nineteenth or early twentieth-century author writing in English may use "prevaricator" to mean nothing more than a dishonest witness, while a civilian jurist using the same word is invoking a technically defined offense. The Digest citation in Black's (47.15.1) is the anchor reference — researchers needing primary source grounding should locate the relevant Digest passage, which addresses the action available against an advocate who colluded against his own client.
This entry appears only in the Supplemental material to Black's 2nd Edition, suggesting it was not prominent enough in Anglo-American practice to earn a place in the main dictionary. This itself is diagnostic: the term was sufficiently exotic to common law practitioners that it required supplemental treatment, signaling its civilian pedigree.
Researchers tracing the history of professional responsibility and attorney duties of loyalty may find this term useful as a civil law antecedent to modern conflict-of-interest doctrine. The underlying concept — that an advocate owes undivided loyalty and may not collude with the adverse party — is foundational to professional ethics in every jurisdiction, even where the Latin term is not used.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) Supplemental is the only shelf source providing a definition. It is brief and accurate: it identifies the term as Latin, locates it in the civil law, defines the actor as one who betrays his trust, specifies the particular context of an advocate aiding the opposite party, and cites the Digest. There is no meaningful divergence to report across shelf sources because no other historical dictionary in the Law Mind corpus provides an entry.
What the historical sources do not supply is any account of the procedural mechanism by which a prævaricator was prosecuted or sanctioned under Roman law, or any discussion of whether English ecclesiastical or admiralty courts adopted the concept formally. Those gaps would require research in civilian treatises beyond the standard legal dictionary shelf.
Jurisdictional Note
The term has no operative legal meaning in modern American or English common law. It is a civil law term relevant primarily to Roman law scholarship, comparative law, and the history of professional responsibility. Scots law and historical ecclesiastical courts may be the most productive jurisdictions for researchers seeking common law–adjacent applications.