Publications which are counter to the general good are to be forbidden.

Your idea runs counter to our policy.

The shop was selling under-the-counter goods.

The teacher gave the students a homework assignment, which was a countable noun.

The countdown has begun for the rocket launch.

Her countenance showed a mix of surprise and confusion.

The counter at the store is responsible for calculating the total amount of purchases.

Eating healthy foods can counteract the negative effects of stress.

The counteraction of the medication caused side effects.

I have three countable items in my bag.