maven (noun) - someone who is experienced, knowledgeable, or well-informed; a connoisseur or aficionado [mey-vuhn]
BREAKDOWN: The term maven comes from Yiddish maven, meyvn, or mayven meaning expert. The original source is the Hebrew word mayvin or mebhin (מבין), meaning one who understands.
“The critical thing about Mavens, though, is that they aren't passive collectors of information. It isn't just that they are obsessed with how to get the best deal on a can of coffee. What sets them apart is that once they figure out how to get that deal, they want to tell you about it too.” ―Malcolm Gladwell

[Our Wednesday Wildcards are fascinating and important words that are not necessarily derived from classical roots.]