untenable – not able to be defended

(Pronounced uhn-ten-uh-buhl)

To remember the definition of the word untenable, use the following mnemonic:

If you are under ten then you are not able (untenable) to defend yourself. 

Examples of untenable in a sentence

The new evidence made the defendant's claim completely untenable. 

His untenable theory wasn't worth researching any further. 

Their untenable actions have caused a lot of suffering.