He headed to the battlefield with an assault rifle.

He lost his life in a gunfight.

He is indecisive and always hesitates about what to choose.

He has an indecisive personality and is always unsure about what to choose.

This old dictionary is a priceless treasure to me.

The police used a water cannon against the demonstrators.

The rechargeable battery has run out, so I'm going to buy a new one.

A new polymer was produced by this chemical reaction.

He is good at flying an airplane.

My son participates in judo practice every day.