'Grievous' in the Bible

So I hated life, because the work that is wrought under the sun was grievous unto me; for all is vanity and a striving after wind.

There is a grievous evil which I have seen under the sun, namely , riches kept by the owner thereof to his hurt:

And this also is a grievous evil, that in all points as he came, so shall he go: and what profit hath he that he laboreth for the wind?