adj
unexplained
adj
1
Not yet accounted for; of unknown cause.
"The police are investigating an unexplained death in the city centre."
How to Use Unexplained
Learner’s notesIn plain EnglishNo explanation has been given yet, though one may exist.
Easily confused with
Common pairings
unexplained absence
unexplained death
remains unexplained
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The police are investigating an _____ death in the city centre.
Etymology
From un- ("not") plus explained, the past participle of explain.