Unpardonably

adv. (UN-¹ 11, 5 b.)

1

1645. Milton, Tetrach., 12. Those mighty syllables … which take upon them to joyn heavn and hell together unpardnably till death pardon.

2

1811. Miss L. M. Hawkins, C’tess Gertr., I. 111. We have both deviated most grievously and unpardonably from our duty.

3

1866. Freeman, Hist. Ess. (1871), 9. English people—more unpardonably still—reject it.

4