By Deane Barker

Definition: obscure; difficult to understand

It comes from a Latin word meaning “to conceal.”

When I read the definition, I thought to myself, “That sounds like ‘esoteric.'” Then I checked a synonym guide, and the first synonym suggested was “esoteric.”

Why I Looked It Up

From Spam: A Shadow History of the Internet:

Their sources include all the canonical texts and work in the public domain available on sites like Project Gutenberg, as well as more recondie materials.

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