unexplained

adjective

un·​ex·​plained ˌən-ik-ˈsplānd 

: not explained or accounted for

an unexplained error

an unexplained delay

Examples of unexplained in a Sentence

Recent Examples on the Web

Yet, fundamental problems remain with this theory, such as the unexplained nature of dark energy and dark matter, the singularity at the Big Bang, and inconsistencies between general relativity and quantum mechanics. —Victoria Corless, Space.com, 24 June 2025

While those changes remain unexplained, this television project provides a clear, non-contractual reason for his upcoming absence from WWE. —Andrew Ravens‎, MSNBC Newsweek, 6 June 2025

Appendix cancer can be difficult to detect early on, with vague symptoms like abdominal pain, fatigue, and unexplained weight loss. —Tom Gavin, EverydayHealth.com, 10 June 2025

After several unexplained memory slips, there came a day when my wife, Geri, didn’t recognize her own face in the mirror. —Jim Taylor, Chicago Tribune, 8 June 2025

Word History

First Known Use

1721, in the meaning defined above

Rhymes for unexplained

• foreordained
• unascertained
• abstained
• arraigned
• attained
• bloodstained
• campaigned
• complained
• constrained
• contained
• curtained
• detained