not known

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.

"It is known that volcanoes emit methane during eruptions, but until now it was not known that volcanic ash is also capable of partially cleaning up this pollution," he adds.

From Science Daily • May 10, 2026

The origin of the outbreak is still unknown and it is not known if people other than cruise ship passengers and crew have been infected with the disease.

From BBC • May 8, 2026

Those who doubt So Happy point to his breeding: His sire, Runhappy, was a champion sprinter not known for producing horses who can run more than a mile.

From Los Angeles Times • May 2, 2026

Ten days after Peruvians voted in the first round, it is still not known who will face off conservative frontrunner Keiko Fujimori in June's runoff.

From Barron's • Apr. 22, 2026

Of course, Ralph had to investigate and found his back stuck to something he had not known about—Scotch tape.

From "Ralph S. Mouse" by Beverly Cleary