Origin of perfidious
Examples from the Web for perfidiously
Taking advantage of his absence, they perfidiously vilified him to the king.
This man entered into a conspiracy with the English, to betray to them the King to whom he had perfidiously sworn allegiance.Joseph Bonaparte|John S. C. Abbott
(Perfidiously to the Marchioness) Look out, you know he's becoming dangerous for you.Three Plays|Luigi Pirandello
His mistress loved him as long as his money lasted; when he had no more to throw away upon her she perfidiously betrayed him.The Press-Gang Afloat and Ashore|John R. Hutchinson
He had been perfidiously treated, and Albuquerque now, in 1511, appeared before the city to call the monarch to account.Ocean's Story; or Triumphs of Thirty Centuries|Edward Rowland
British Dictionary definitions for perfidiously
Word Origin and History for perfidiously
1590s, from Latin perfidiosus "treacherous," from perfidia (see perfidy). Related: Perfidiously; perfidiousness.