unexplained

adjective/ˌʌnɪkˈspleɪnd/

Frequency rank: #9,783 most common English word

Meaning

not accounted for or given a reason; mysterious.

Illustration for the English word “unexplained”

Example sentence

The police closed the case, but many witnesses were still troubled by the unexplained events that had occurred that night.

Synonyms & related words

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