'Difficult' in the Bible

And Amnon was so vexed, that he fell sick for his sister Tamar; for she was a virgin; and it seemed difficult for Amnon to do the least thing to her.

For thou art not sent to a people of strange language, and of difficult speech, but to the house of Israel;

not to many peoples of strange language and of difficult speech, whose words thou canst not understand: had I sent thee to them, would they not hearken unto thee?

And the disciples were amazed at his words. And Jesus again answering says to them, Children, how difficult it is that those who trust in riches should enter into the kingdom of God!

But this know, that in the last days difficult times shall be there;