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pressure-treated

American  
[presh-er-tree-tid] / ˈprɛʃ ərˌtri tɪd /

adjective

  1. (of wood) treated with a chemical or chemicals applied under pressure to reduce such problems as insect infestation, decay, and rotting.


Etymology

Origin of pressure-treated

First recorded in 1935–40

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The decking company built its business on composite boards made from sawdust and recycled plastic shopping bags, which it pitches as more durable than pressure-treated lumber.

From Barron's • Nov. 7, 2025

Dick Treacy, who lives down the road, said Dufault, a florist, came to his house earlier this month to pick up pressure-treated wood he’d flagged in the local Buy Nothing group, he said.

From Washington Post • Apr. 19, 2023

The rest of the structure was built from off-the-shelf materials like pressure-treated lumber for framing and corrugated metal for the roof.

From New York Times • Nov. 29, 2022

While pressure-treated products are made to withstand outdoor use, they’re often less attractive and the boards are essentially coated in poison — not an ideal material for a deck surface.

From Seattle Times • Jul. 14, 2021

“I got a call come in at four-thirty needing a load of pressure-treated for a deck. Five-hundred-dollar order. And guess what? I didn’t have nobody to deliver it.”

From "The Serpent King" by Jeff Zentner

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