I learned about anhydrides in chemistry class.

He is known for his rash actions.

His rash actions surprised the people around him.

He was born with adactylism.

In Buddhism, the beginning of this world is considered to be eternal without beginning, called 'Mushi'.

He is completely apathetic towards that issue.

He made an inconsiderate remark and hurt everyone.

I was really surprised by his inconsiderate behavior.

I can't stand his ill-mannered attitude.

I can't stand his ill-mannered attitude.