Origins
The English verb "legislate," meaning to make or enact laws or to exercise the function of legislation, is a relatively recent linguistic formation that emerged in the 18th century. Its origin is closely tied to the noun "legislation," from which it was back-formed. The process of back-formation involves creating a new word by removing an affix or perceived affix from an existing word, often changing its grammatical category. In this case, "legislate" was coined by trimming the noun "legislator" down to a verb, a formation not present in Classical Latin.
The noun "legislation" itself entered English from Late Latin "lēgislātiō," which denotes the act of proposing or enacting a law. This Late Latin term derives from "lēgislātor," meaning a proposer or bearer of a law. "Lēgislātor" is a compound word formed from two Latin elements: "lēx," meaning "law" or "statute," and "lātor," meaning "bearer" or "proposer." The latter comes from "lātus," the irregular past participle of the verb "ferre," which means "to bear" or "to carry." Thus, "lēgislātor" literally translates to "law-bearer" or "law-proposer," emphasizing the role of one who brings forth or carries laws.
The Latin root "lēx" is central to the etymology of "legislate" and its related forms. While the precise origin of "lēx" is debated among linguists, it is generally accepted to derive from the Proto-Indo-European (PIE) root *leǵ-, which carries the meaning "to collect" or "to gather." This semantic connection is significant because it reflects the conceptualization of a law as a collection or gathering of rules and statutes that govern behavior within a community. The PIE root *leǵ- is also the source of various cognates in other Indo-European languages related to law, reading, and collecting, although the exact pathways and semantic shifts vary.
Latin Roots
the verb "legislate" itself did not exist in Classical Latin. Latin had other verbs related to lawmaking and proposing laws, but "legislate" as a verb is an English innovation formed by analogy with existing nouns and agent nouns such as "legislator." The creation of "legislate" in English reflects a broader pattern in the language of forming verbs from nouns, especially those ending in "-ate," which often denote the performance of an action associated with the noun's meaning.
The introduction of "legislate" in the 18th century corresponds with a period of increased interest in political theory, governance, and the codification of laws, particularly in English-speaking countries. The term provided a succinct verbal form to describe the act of making laws, complementing existing legal and political vocabulary.
"legislate" is a back-formation from "legislation," which itself comes from Late Latin "lēgislātiō," derived from "lēgislātor," a compound of "lēx" (law) and "lātor" (bearer). The root "lēx" likely traces back to the Proto-Indo-European root *leǵ-, meaning "to collect" or "to gather," reflecting the conceptual nature of law as a collection of rules. The verb "legislate" is an English linguistic creation from the 18th century, not inherited from Latin but formed by analogy and back-formation from related Latin-derived nouns.