莫名其妙 [- mínɡ qí miào]be rather baffling; be all adrift [abroad]; be baffled; be in a fog; be unable to understand; be unable to make head or tail of sth.; cannot make anything of it; difficult to guess what it is all about; have neither rhyme nor reason; ignorant of the heart of the matter; incomprehensible; inexplicable; make neither head nor tail of (it); odd; queer; absurd; indescribable; seem totally in the dark; can make nothing of it; very mysterious and abstruse; without rhyme or reason:•¶ 她的行为使我莫名其妙。 Her conduct is a mystery to me.
•¶ 他一声不吭就走了， 真叫人莫名其妙。 It is quite baffling that he left without a word.
•¶ 她莫名其妙地生起气来。 She got angry without rhyme or reason.