inexplicable
adjective
[ ˌɪnɪkˈsplɪkəb(ə)l ]
• unable to be explained or accounted for.
• "for some inexplicable reason her mind went completely blank"
Similar:
unaccountable,
unexplainable,
incomprehensible,
unfathomable,
impenetrable,
insoluble,
unsolvable,
baffling,
puzzling,
perplexing,
mystifying,
bewildering,
mysterious,
strange,
weird,
abstruse,
enigmatic,
beyond comprehension,
beyond understanding,
wildering,
insolvable,
Origin:
late Middle English: from French, or from Latin inexplicabilis ‘that cannot be unfolded’, from in- ‘not’ + explicabilis (see explicable).