ob-STREP-er-uhs
The obstreperous child disrupted the entire classroom with his outbursts.
Fun Fact
From Latin ob (“against”) and strepere (“to make a noise”), obstreperous behavior isn’t just loud—it’s defiantly loud. Think protestors clashing with police, or characters in sitcoms who constantly shout over one another. It’s not just chaos—it’s resistant chaos.
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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