Adjective

I stand on the privilege of a free Scotchman, and will brook no insult unreturned, and no injury unrequited .

One of my comrades there—another of those victims of eighteen years of unrequited toil and blighted hopes—was one of the gentlest spirits that ever bore its patient cross in a weary exile.

To her mind, a girl who would tell of the unrequited love of a man for herself, was unspeakably base.