What does unexplained mean?
Unexplained is an adjective meaning that something has no known or accepted explanation. It is commonly applied to events, phenomena, failures, discrepancies, absences, and other matters that ought, in context, to be understood or accounted for. Unlike mysterious, which can suggest that something is eerie or secret, unexplained focuses mainly on the absence of an explanation. It often carries a formal, matter-of-fact tone, as in an unexplained outage or an unexplained disappearance. The adjective can also describe a result that has been observed but not yet understood. Because it implies a gap in knowledge, unexplained is useful in reporting, research, safety investigations, and everyday conversation. It can describe an unresolved question without implying that the mystery is permanent. Its force comes from distinguishing what observers can confirm from what they cannot yet explain.
adjectiveNot explained, understood, or accounted for.
- Not explained or understood.
- Not accounted for or discovered.
"Investigators are still searching for an explanation of the unexplained disappearance."
"The report attributed the fault to an unexplained software error."
"Her sudden absence remained unexplained for several days."
Unexplained has a quiet power: it names the moment when what happened is clear, but why it happened is not.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does unexplained come from?
Unexplained was formed in English by adding the negative prefix un- and the participial ending -ed to explain. The word explain entered Middle English from Old French and ultimately derives from Latin explicare, meaning “to unfold” or “to make clear.” English forms related to the same root include explate?
Related word forms
How unexplained is actually used
Generally neutral and often formal, especially in journalism, research, safety investigations, and technical reports. It can describe anything lacking an accepted explanation without necessarily implying that the mystery is permanent or sinister.
Easily confused with unexplained
Unexplained states that no explanation is known or accepted, whereas inexplicable often emphasizes that something seems impossible or impossible to understand.