pur, total
This is sheer madness.
C'est de la pure folie.
— Pan's Labyrinth (2006)
Out of sheer solidarity?
Par pure solidarité ?
— Laurence Anyways (2012)
It's sheer lunacy!
C’est de la pure folie !
— The Visitors (1993)
But never before has anyone, out of sheer laziness, written down such crap.
Mais jamais encore personne n’avait écrit de pareilles conneries par pure paresse.
— How I Ended This Summer (2010)
It's sheer madness.