Webster's Revised Unabridged Dictionary · 1913

Damnable

Damnable , adjective

[Latin damnabilis, from damnare: compare French damnable. See Damn.]

1.
Liable to damnation; deserving, or for which one deserves, to be damned; of a damning nature.
A creature unprepared unmeet for death, And to transport him in the mind he is, Were damnable. — Shakespeare
2.
Odious; pernicious; detestable.
Begin, murderer;... leave thy damnable faces. — Shakespeare