Quinine is used for the treatment of malaria.

We need to repaint the outer wall of our house.

He is my greatest opponent.

He has been a stamp collector since long ago.

That movie was very impressive.

Keith is my best friend.

His movements were mechanical, as if devoid of emotion.

Our family has become multicultural through intermarriage.

Our families have been intermarrying for a long time.

I use a clamp to secure this wood.