acuity

PRONUNCIATION: (uh-KYOO-i-tee)
MEANING:
noun: Sharpness; keenness.
ETYMOLOGY:
Via French from Latin acuere (to sharpen). Ultimately from the Indo-European root ak- (sharp), which is also the source of acrid, vinegar, acid, acute, edge, hammer, heaven, eager, oxygen, mediocre, paragon, and acescent. Earliest documented use: 1400.
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ACULTY - to act as a cult. Ex: self-serving scientists who believe that the oceans will rise almost six inches in this Century and the sky is falling oh my!