AK-yoo-men
(noun) Keen insight or the ability to make quick, smart decisions.
Her business acumen turned the small shop into a thriving franchise.
Fun Fact
“Acumen” stems from the Latin acuere, meaning “to sharpen.” It refers not just to intelligence, but to mental sharpness in practical matters, such as strategy, leadership, or negotiation. From investors to chess players, acumen separates the instinctive from the merely informed.
uh-KREE-shun
(noun) Growth or increase by the gradual accumulation of additional layers or matter.
The planet formed through accretion as dust and gas particles slowly clumped together over millions of years.
Early 17th century: from Latin “accretio(n-),” from “accrescere” meaning “to grow,” from “ad-” (to) + “crescere” (to grow).
Fun Fact
Accretion explains how planets, pearls, and your retirement savings all grow—through gradual addition rather than sudden creation. Astronomers use accretion disks to describe how matter spirals into black holes, adding mass bit by bit. Oysters create pearls through accretion, coating irritants with layer upon layer of nacre. Financial advisors love the term for describing compound interest’s power. While “accumulation” works similarly, accretion specifically emphasizes the layering process—each addition building on what came before. The Antarctic ice sheet grows by accretion as annual snowfall compresses into new ice layers, preserving ancient atmospheric bubbles like geological time capsules.
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