Wiktionary
falsehearted
a. (alternative spelling of false-hearted English)
Usage examples of "falsehearted".
Hate me, falsehearted creature, hate me, since such is my unhappy fate, but never hope to vanquish the love for you which burns within me.
Now tell me the name, if you can, of this falsehearted flatterer, for you know him as well as another, and better than some.
And how quickly he regained his domineering manner once it was slaked, the falsehearted craven.