An antiparticle is a particle that pairs with a matter particle.

He was expelled from the party because he took anti-party actions.

He likes to take a walk in the park at dusk.

He engaged in an extravehicular activity from the spaceship.

He is undergoing training for extravehicular activity.

He emphasized his belief by saying, 'I believe in order to understand.'

She described the pain of a broken heart as tears.

I don't know a thing about him.

The American Civil War is one of the bloodiest wars in American history.

He got the spoils of war.