unguessable

Adjective

 * 1) Not capable of being guessed.
 * 2) * 1898,, , in The Two Magics, London: Heinemann, Chapter 13, p. 101,
 * What it was most impossible to get rid of was the cruel idea that, whatever I had seen, Miles and Flora saw more—things terrible and unguessable and that sprang from dreadful passages of intercourse in the past.
 * What it was most impossible to get rid of was the cruel idea that, whatever I had seen, Miles and Flora saw more—things terrible and unguessable and that sprang from dreadful passages of intercourse in the past.