For good

A bad haircut is no fun, but at least you’re not stuck with it for good, only until it grows out.

This day I left Chelsea for good (that's a genteel phrase) and am got into Suffolk street.

[S]he was dozing in the elbovv-chair, having refuſed to lie dovvn, ſaying, She ſhould ſoon, ſhe hoped, lie dovvn for good.

Well, now, I'm no scholar, and you're a lad as can read and figure; and, to put it straight, do you take it as a dead man is dead for good, or do he come alive again?

What I want is to get out of this fix, for good—so I can go to sleep at night without worrying over what's going to happen to me tomorrow, and next month, and next year.

Yes, and thanks for the trouble you took from her eyes. I thought it was there for good so I never tried.

Whatever I said, whatever I did, I didn't mean it / I just want you back for good

He […] unbuttons the bottom of his jacket so the rumors can be dispelled for good: he no longer wears his double belts.