Untenable in a sentence as an adjective

The processing cost makes it untenable for all but the tiniest of URL-spaces.

You know that DDG is an untenable alternative without Bing, right?

That's why I stayed on for several months after that, until things became untenable for me.

The background traffic increased until the latency became untenable.

If the Nook becomes untenable as a business B&N could become untenable as a business and sooner or later they'll go the way of Borders Books.

There is a motto with helmets in many sports I have participated in:The best helmet, is the helmet you will wearThe rms approach, while effective, is untenable for most people.

It's actually an interesting question: When does a political opinion become untenable?Slavery was once a political opinion.

There are no mainstream politicians here who hold scientifically untenable positions about evolution, global warming, vaccinations/autism, abortion, and so on.

Untenable definitions

adjective

(of theories etc) incapable of being defended or justified

See also: indefensible