unexplainedreason
nounUK /ˌʌnɪkˈspleɪnd ˈriːzən/
US /ˌʌnɪkˈspleɪnd ˈriːzən/
A reason that nobody can explain or understand.
The teacher gave an unexplained reason for canceling the trip.
RELATED WORDS
OTHER MEANINGS
2. A cause that is kept secret on purpose.
He left for an unexplained reason that no one was allowed to ask about.
3. A justification that seems strange or hard to believe.
She gave an unexplained reason for being late, and everyone wondered why.
4. A motive that has not yet been discovered.
The detective searched for the unexplained reason behind the missing painting.