Translation of begründen

He also told me that he had build his scooter by himself. I could not understand how a doctor was able to build such a machine on his own. It seems that the circumstances made people capable of many things.
If that gets out of control (riots or support for radicals), there may flourish a steady ground on which the mentioned could reoccur. Then after a while this turns to be nationalism on a larger scale.
One would immediately fall in love with Sapa. We checked in our accommodation which was clean and large rooms. We came just for breakfast and enjoyed the view of the surrounding hills from the terrasse.