unleal

He craves for himself the sturdy courage of Bevis of Hampton, the courtly grace of Launcelot, the purity of Gallahad; and he hates with an honest hatred that unleal scoundrel, King Mark.

Queer Stories for Boys and Girls Edward Eggleston 1869

"There was a time, Count William, when I should have deemed it honour to hold parle with Harold the brave Earl; but now, with the crown on his head, I hold it shame and disgrace to barter words with a knight unleal and a man foresworn."

Harold : the Last of the Saxon Kings — Complete Edward Bulwer Lytton Lytton 1838

"There was a time, Count William, when I should have deemed it honour to hold parle with Harold the brave Earl; but now, with the crown on his head, I hold it shame and disgrace to barter words with a knight unleal and a man foresworn."

Harold : the Last of the Saxon Kings — Volume 12 Edward Bulwer Lytton Lytton 1838

"Now by the bones of St. Valery," said William, after a pause, in which his dark keen eye noted the gloom upon the King's gentle face, "it moves much my simple wonder how even presence so saintly can hear without wrath words so unleal and foul.

Harold : the Last of the Saxon Kings — Complete Edward Bulwer Lytton Lytton 1838