100 important words: acumen

acumen
Means: Quickness, accuracy, and keenness of judgment or insight.
Review: Handy and fairly well-known. I actually encountered this word in real life. "Exhuming McCarthy", an early song of REM, contains the lyrics: "Sharpening stones, walking on coals, to improve your business acumen."
First Google link is to dictionary: No, but Google includes links to dictionary sites in the results.
Example:
When Hank's boss found him slouched over his desk, asleep and drooling, she became less convinced of his professional acumen.

Hits for media sites	Site Hits
Washington Post	414
New York Times	409
USA Today	251
Fox News	19