Definition
A Law French term meaning the act of impairing or prejudicing. Impierment denotes the damaging, weakening, or prejudicial affecting of a right, interest, or legal position. It appears primarily in historical statutory and glossarial contexts and is not a term of active modern legal usage.
Why It Matters in Research
Researchers encountering impierment will almost certainly find it in one of two places: transcriptions or digests of early English statutes (particularly from the reign of Henry VIII), or in nineteenth-century legal dictionaries that drew on Jacob's Law Dictionary and Blount's Glossographia for Law French vocabulary. The term itself carries no independent doctrinal weight in modern law; its significance is purely lexical and historical.
The chief research trap is unfamiliarity with Law French abbreviation and spelling variation. Historical sources may render the term as impierment, empierment, or related forms. Burrill specifically notes the statutory source as 23 Hen. VIII c. 9, which provides a concrete anchor for researchers working with Tudor-era primary materials. Without that anchor, the term can appear to float free of any legal context.
Researchers tracing the concept — rather than the word — should pivot immediately to modern equivalents: impairment, prejudice, and injury to legal rights. These terms carry the substantive legal load that impierment once gestured toward in Law French usage.
Historical Dictionary Support
The historical dictionaries are in close agreement, which is unsurprising given their shared lineage. Black's (both editions) and Rapalje & Lawrence each offer the identical gloss — "impairing or prejudicing" — citing Jacob. Bouvier echoes this, also citing Jacob's Law Dictionary. Burrill adds the most useful detail: he identifies the statutory citation (23 Hen. VIII c. 9) and traces the term through Blount and Kelham, directing researchers to the related headword "Empire." This chain of authority suggests the term was never independently analyzed but rather passed from glossary to glossary as a standing entry.
What the historical dictionaries do not provide is any substantive analysis of how impierment functioned within the statute that generated it, or how courts may have interpreted the concept in practice. The entry in each source is definitional only — a translation gloss rather than a legal exposition. Researchers expecting doctrinal guidance will find none here.
Jurisdictional Note
Impierment as a term has no modern jurisdictional presence in American or Commonwealth law. Its relevance is confined to English legal history, specifically Tudor-era statutory drafting in Law French.