莫名其妙

mòmíngqímiào
(idiom) baffling; bizarre; without rhyme or reason; inexplicable

CEDICT

Entry Composition

1 莫名 mòmíng inexpressible; indescribable; unexplainable; inexplicable
2 其 qí
  1. his
  2. her
  3. its
  4. their
  5. that
  6. such
  7. it (refers to sth preceding it)
=3 妙 miào
  1. clever
  2. wonderful
=3 妙 miào variant of 妙 miào