I have three countable items in my bag.

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.

The army launched a fierce counterattack against the enemy.

The counterattraction between the two magnets caused them to repel each other.

The government is trying to counterbalance the economic downturn with tax cuts.

The government's decision to increase taxes was met with a counterblast from the opposition party.