He acted scoundrelly and troubled his friends.

He is known as the most scoundrelly in town.

To be frank, I don't really like that idea.

He comes from an old samurai family.

I work in the marketing division.

I went to the locksmith to make a duplicate key.

In order to maintain the security of encrypted communication, we perform key exchanges regularly.

Every morning, I check the lock opening before leaving the house.

I forgot my key and ended up not being able to get into my house.

This ancient ruin is engraved with the shape of a counterclockwise swastika.