Patent
Etymology
From Latin “patens” (lying open), from “patere” (to lie open or be exposed) — the same root as the medical “patent,” meaning unobstructed. It comes from “letters patent,” open documents issued by a sovereign for all to read. The irony is built in: a patent grants a private monopoly through a publicly open declaration.
noun · /PAT-uhnt/
A time-limited monopoly granted to an inventor over the making and selling of a new invention, in exchange for publicly disclosing how it works.
What it names
The bargain society strikes with inventors — reach for it to name the trade of temporary exclusivity for permanent public knowledge.
Example
The startup filed a patent on its battery design, trading its secret for twenty years of exclusive rights.
Related idea
A patent protects how an invention works; a trademark protects the name or logo it is sold under — a company can hold both on the same product.
adjective · /PAT-uhnt/
Clearly obvious; plain to see.
What it names
something so evident it needs no proof.
Example
That excuse is patent nonsense.
Related idea
Both senses come from Latin "patere," to lie open — a patent lays an invention open to view, and patent nonsense lies open to everyone.