Synonyms for truthless

There's another example of the error of your polite and truthless tongue!

It could never, by any logic, find its reality in the emptiness of the truthless abyss.

“The more the merrier,” was his 11 motto––one of the most truthless of the old saws.

My entire relation to the world is "worthless and truthless."

The old cunning look came into her eyes, and her quick, truthless mind was evidently on the alert.

It seemed to him hopeless that man could ever ascertain the truth, since he has no other aid than truthless appearances.

And to think I had come to imagine I was loving this beguiling, this truthless, this treacherous monster!