false-hearted

"And if there is now and then one among them who is not false-hearted," continued Mona, "is she not respected and loved for it?"

From Rockhaven by Charles Clark Munn

And all that time Harold, false-hearted, fair-spoken, mean-spirited Harold, was enjoying himself and playing the gallant to Isabel Walters!

From The Beckoning Hand and Other Stories by Grant Allen

He ate scarcely any food; but drank wine freely, remarking, however, that it was false-hearted stuff, did him no good, and had no taste as wine used to have.

From The Atlantic Monthly, Volume 17, No. 104, June, 1866 by Various

The charming Eyes of Madame de R—— made me forget the false-hearted Creature on whom I had doated.

From The Memoirs of Charles-Lewis, Baron de Pollnitz, Volume III Being the Observations He Made in His Late Travels from Prussia thro' Germany, Italy, France, Flanders, Holland, England, &C. in Letters to His Friend. Discovering Not Only the Present State of the Chief Cities and Towns; but the Characters of the Principal Persons at the Several Courts. by Karl Ludwig von P?llnitz

He therefore warmly resents Wordsworth's remark about "that cold and false-hearted, frenchified coxcomb, Horace Walpole."

From The Gentle Reader by Samuel McChord Crothers