inexplicable
Definitions
adj
Impossible to explain; not easily accounted for.
The year 1866 was signalised by a remarkable incident, a mysterious and inexplicable phenomenon, which doubtless no one has yet forgotten.
“No,” replied the girl, “it would not be strange, of course; but for some inexplicable reason I have one of those foolish feminine presentiments that all is not right with Mr. Caldwell. It is the strangest feeling—it is as though I knew that he was not on board the ship.”
noun
Something that is impossible to explain.
HEE [Cleanthes] left behind him (ſaith [Diogenes] Laertius) theſe excellent Books. […] Of Inexplicables.
The premature passing of Bob Collins and the sadness it begets leave us in wonder. A man of vigor and vitality, compassion and concern, and a joyous contributor enhancing each new day is suddenly no more. Or is that also conjecture or gospel? Could it be that his departure is but a chapter in the imponderable mystery we long to comprehend? An inexplicable that cannot be perceived?