Unfamiliar words, places, and sundry other references get added to the list with a view toward richer cultural and conversational engagement.

Recently Erased Ignorance
Ignorance Explained
1 cognomen nickname
2 descant a discourse on a theme or subject
3 lenity synonym (usage appears archaic) for leniency
4 inveigle gain entrance to (a place) by persuading (someone) with deception or flattery
5 crepuscular that which is related to twilight
6 trammel to catch as with a net, or confine
7 byre a cow barn (British)
8 ouroboros a circular symbol depicting a snake, or less commonly a dragon, swallowing its tail, as an emblem of wholeness or infinity.
9 gainsay to declare to be untrue or invalid. CONTRADICT, OPPOSE
10 simulacrum an image or representation of someone or something

The full list can be viewed here.

Definitions appearing on this page are generally either verbatim or derived from Merriam-Webster's College Dictionary, Tenth Edition, 1999 or its online counterpart.