The shake a leg made it absolutely authentic, along with other things.

The sky, the light, everything, is absolutely authentic and place-specific.

"Goodfellas" looks and sounds as if it must be absolutely authentic.

"Then the evidence it contains is unknown to us and absolutely authentic."

He's absolutely authentic, and when he says something he means it.

Ms. Barker makes the conversations between her poets and the doctors at the hospital sound absolutely authentic.

Everything should give the appearance of being absolutely authentic.

There are times when I'm convinced that he's absolutely authentic.

She'll immerse herself in research, reading all the background material she can find; and, of course, she'll take great care to look absolutely authentic.

These usually involve small areas and small numbers of persons, but they can be absolutely authentic.