1. An official policy that calls on diplomats to distort the historical facts is an untenable policy.

2. All these arguments turned out to be untenable, he said.

3. What Russia has done in the Ukraine is being judged by all the countries around the world as unacceptable, untenable behavior.

4. Automakers have said repeatedly that it is untenable to manufacture separate fleets of vehicles to meet different standards.