of unknown origin

phrase

—used to say that the source or cause of something is not known

a disease of unknown origin

Examples of of unknown origin in a Sentence

Recent Examples on the Web

No, this isn’t another ubiquitous website platform where bids for cars of unknown origin (and at times questionable quality) are seemingly submitted into the ether, and each party hopes for the best. — Viju Mathew, Robb Report, 4 Nov. 2026

Anyone who has purchased a MECOOL or white label Android TV box of unknown origin should check it. — Ryan Whitwam, ArsTechnica, 3 Nov. 2026

Initially, county officials declined to open the list, citing the security threat of inserting a thumb drive of unknown origin into a government computer. — Miles Parks, NPR, 21 Oct. 2026

Rospotrebnadzor has said that the lab worker at a plague research institute in Irkutsk in southeastern Siberia died of pneumonia of unknown origin. — ABC News, 8 Oct. 2026

Rhymes for of unknown origin

• orogen