1382. Wyclif, Ezek. xxxii. 12. Alle thes folkis ben vnexpugnable, or mowen not be ouercomen. Ibid. (1388), 2 Macc. xii. 21.
1533. Bellenden, Livy, II. iv. (S.T.S.), I. 140. He began to edifie ane strang toure quhilk be municioun and straitnes of þe ground apperit Vnexpugnabil.
1608. Chapman, Byrons Conspir., Plays, 1873, II. 225. Their owne strengths Are not so sure and vnexpugnable But that [etc.].
1653. H. Cogan, Diod. Sic., 70. Arabia is a country unexpugnable to a forraign enemy.
1831. Scott, Ct. Rob., xxiv. A safe and unexpugnable barrier of the empire against the Saracens.