Not given a reason or explanation; mysterious or unclear because no one has explained it.
From prefix 'un-' (not) plus 'explained,' from Old French 'expliquer,' from Latin 'explicare' (to unfold or make clear). The prefix 'un-' inverts the meaning to indicate the absence of clarity.
Notice how 'explained' comes from Latin 'explicare,' which literally means 'to unfold'—like you're unfolding the mystery into understanding. When something stays 'unexplained,' it's still folded up, which is why it feels so frustrating!
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