Definition
A Latin legal term meaning to invalidate, annul, or deprive of legal force and effect. In classical Roman and civil law usage, *infirmare* described the act of rendering a legal instrument, judgment, or testamentary disposition void or without operative strength. The term appears most prominently in discussions of the ways in which wills could be rendered legally ineffective — whether by revocation, incapacity, formal defect, or operation of law.
Why It Matters in Research
INFIRMARE is a term researchers will encounter almost exclusively in pre-modern sources rooted in Roman and civil law tradition — particularly in treatises on testamentary law, canon law, and early English equity. It does not survive into modern Anglo-American legal vocabulary as a working term; modern sources use *invalidate*, *void*, *annul*, or *vacate* depending on context. When encountered in a historical source, the term signals that the author is drawing on civilian or Romanist learning, which is a useful indicator of intellectual lineage.
The key research trap is treating INFIRMARE as equivalent to any single modern term. In Roman law, a will could be *infirmata* in several distinct ways — preterition of a necessary heir, the testator's loss of capacity after execution, or the birth of a posthumous child who displaced the earlier instrument — and these were categorically different legal events with different consequences. A source using INFIRMARE without specifying the mode of invalidity may be speaking loosely. The cross-reference in Burrill to the *Institutes* of Justinian (2.17) is precise and should be consulted directly when the mode of invalidity matters to the research question.
Researchers working in early American and colonial legal materials should note that INFIRMARE and its cognates occasionally appear in equity pleadings and ecclesiastical court records where parties sought to challenge the validity of wills. In those contexts, the term is not merely decorative Latin — it carries the civilian doctrinal framework with it. Understanding what *infirmare* encompassed in Roman law illuminates what relief was being sought.
Historical Dictionary Support
Burrill's Law Dictionary provides the only entry among the Law Mind shelf sources. The definition is economical but precise: "to invalidate; to deprive of strength or force," with the supporting phrase *quibus modis testamenta infirmantur* — in what ways wills are invalidated — drawn from Justinian's *Institutes* 2.17. This institutional citation is characteristically Burrill: he anchors the term in primary civil law authority rather than English case law, reflecting INFIRMARE's identity as a term of art belonging to the Roman legal tradition rather than the common law.
No common law dictionary on the shelf (Black's, Bouvier, Jacob) treats INFIRMARE as a standalone entry, which is itself informative. The term was not absorbed into the technical vocabulary of English common law courts and does not appear in Coke, Blackstone, or the standard common law authorities in its Latin form. Its presence in a legal source is therefore a reliable marker of civilian influence — the author is either working from Roman texts directly or from a treatise in the natural law or civil law tradition.
The limitation of the historical dictionary record here is coverage: Burrill captures the term's civil law meaning accurately but does not discuss its reception in English equity or ecclesiastical practice, where it does occasionally appear. Researchers should not assume Burrill's silence on those contexts means the term was absent from them.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Testamentary Law (Roman and Civil Law Tradition); Will Contests and Invalidity.