They are unfriendly brothers.

They are rumored to be in an unfriendly relationship.

In this experiment, we will investigate the structure of atoms using alpha rays.

He got seasick from the long boat trip.

He signs off after finishing his daily work.

I finished my work and signed off.

Lucifer is considered the most beautiful among the angels.

His company fell into default due to the financial crisis.

He was criticized for having fascist thoughts.

The arrival of the Black Ships prompted the opening of Japan.