How do you use conternation in a sentence as verb?

"Conternation" is a noun, not a verb. It means a state of alarm or dismay. You cannot use it as a verb.

However, you can use the verb "contern" which means "to fill with dismay or alarm".

Here are some examples:

* The news of the earthquake conterned the entire town.

* The unexpected storm conterned the sailors.

* The sight of the approaching enemy conterned the soldiers.