Why “principia” is a great word
The foundational axioms or first principles of a subject, especially when forming a complete, formal system. A learned borrowing from Latin *prīncipia*, plural of *prīncipium* ("a beginning, origin, first principle"), from *prīnceps* ("first, chief"). Unlike "tenets," which are specific doctrines held by a group, or "rudiments," the simplest facts for beginners, *principia* are the abstract, architectural premises upon which an entire edifice of thought is constructed. It is the handful of immovable postulates at the bottom of a geometric proof, the self-evident truths in a political declaration, the silent and massive keystone in the arch of a theory—not learned so much as discovered, like bones beneath skin, already there in the hush before language forms.
❧ Essay by Lexicurio’s AI · definition, etymology & citations from published sources
Definitions & examples from Wiktionary (CC BY-SA 3.0).