per

Example Sentences

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The analysis also found that 64 percent of samples contained at least one per- and polyfluoroalkyl substance, also known as "forever chemicals", which are found throughout the environment and everyday products.

From Barron's • Jan. 29, 2026

PFAS, short for per- and polyfluoroalkyl substances, are man-made chemicals that date back to the 1940s.

From Science Daily • Dec. 25, 2025

Thanks to their stain-, water-, and grease-resistant properties, per- and polyfluoroalkyl substances, or PFAS, have been a mainstay of commercial and consumer products for decades.

From Salon • Oct. 22, 2024

PFAS, a vast class of chemicals also called per- and polyfluoroalkyl substances, are widespread in the environment.

From New York Times • Jun. 10, 2024

Perhaps the peaks store rain and distribute it more evenly, and per- haps, being more wooded, they draw more rainfall.

From "East of Eden" by John Steinbeck