'Fail' in the Bible

If the people avoid dealing with that man when he offers his child to Molech that is, if they fail to execute him

And if thy brother be waxed poor, and his hand fail with thee; then thou shalt uphold him: as a stranger and a sojourner shall he live with thee.

and if you refuse my statutes, loathe my ordinances, and fail to carry out all of my commands, thereby breaching my covenant,

then I will do this to you: I will bring terror on you—wasting disease and fever that will cause your eyes to fail and your life to ebb away. You will sow your seed in vain because your enemies will eat it.