Untaintable

Sitting in the front seats of the bus staring at the storm burying the highway and the sagebrush and the antelope, Mike and I were trembling from an untaintable, undauntable expectancy.

How untaintable and sanctimonious are your morals and ethics?

This was rare for a successful Mexican politician, and his supporters held this up as proof that he was not only untainted, but untaintable.