'Sinful' in the Bible

This we know--that our old self was nailed to the cross with Him, in order that our sinful nature might be deprived of its power, so that we should no longer be the slaves of sin;

For whilst we were under the thraldom of our earthly natures, sinful passions-- made sinful by the Law--were always being aroused to action in our bodily faculties that they might yield fruit to death.

What follows? Is the Law itself a sinful thing? No, indeed; on the contrary, unless I had been taught by the Law, I should have known nothing of sin as sin. For instance, I should not have known what covetousness is, if the Law had not repeatedly said, "Thou shalt not covet."

For what was impossible to the Law--powerless as it was because it acted through frail humanity--God effected. Sending His own Son in a body like that of sinful human nature and as a sacrifice for sin, He pronounced sentence upon sin in human nature;

But he who has misgivings and yet eats meat is condemned already, because his conduct is not based on faith; for all conduct not based on faith is sinful.