unutterable sin

Let not your Highness' gracious mind be disturbed on account of these descendants of the enemies and crucifiers of Christ, who, if they suffer at all, do but suffer justly, for the unutterable sin of their forefathers.

The doom which in truth befits the unutterable sin is rather the blank pain without accident or period, without point or salience to draw from stunned nature her last energies of resentment.

Then the rage sank before a swift self-horror, an overwhelming conviction of his relapse into unutterable sin.