This one come from an old letter from an old friend. I like the Latin connection.
Perspicacity
(pur-spuh-KAS-uh-tee)
noun:
Clearness of understanding or insight; penetration, discernment.
Perspicacity comes from Latin perspicax, perspicac-, “sharp-sighted,” from perspicere, “to look through,” from per, “through” + specere, “to look.”
Alright class, please use this word in a sentence. 
Fred McKinnon’s perspicacity into the true meaning of Christmas, revealed through his rendition of “O Holy Night”, is luckily not found anywhere else in the known universe.