He acted with his own beliefs, not blindly following others.

We participated in an arm wrestling tournament yesterday.

He can't easily escape from his attachment to delusional ideas.

In that war movie, vigorous bombings were frequently depicted.

We bombed the enemy's base vigorously.

He has a lot of hair, so he seems warm even in winter.

Polychaete worms play an important role in the seabed ecosystem.

He fought using a spear.

This epidemic spread rapidly around the world.

I always go down the river in a kayak on weekends.