bad: failing the standard of what it should be, whether defective, harmful, or unpleasant, with no question of sin
This is the word at its most ordinary. Long before it ever means wicked, it simply means bad: a thing that falls short of what it should be, or that works against the person who meets it. Rotten figs, foul water, ugly and starving cows, a blemished animal not fit to offer, a buyer running down the goods to drive the price low: these are all this word, and none of them carries any charge of sin.
The senses here spread along one line. At the plain end the word judges quality, the opposite of sound or fit. From there it shades into what does harm to the body, a grievous disease or a painful wound, and then into what is simply hard or sad to live through, a stretch of bleak years, a downcast face, a day a person would rather not have.
What ties the whole range together is a measure, not a moral verdict. The fig is bad against what a good fig should be, the water against what water should do, the face against the cheerful look expected of it. The word always names a falling short of some standard the context supplies, which is exactly why the same word can later name the falling short that is moral wrong without changing its basic shape.