An appendectomy prevented him from competing in the 1932 Olympics.

We will continue our efforts to break down the barriers that prevent them from competing freely throughout Europe and in the wider world.

An injury prevented her from competing in the all around final.

Discrimination against women preventing them from competing with men for admission to certain educational institutions.

But that prevents girls from competing at the regional and state level.

Goldin was aggressive in the use of legal measures to try to prevent anyone from competing with him.

The professional status of footballer prevents him from competing at amateur level.

However, liver illness almost prevented her from competing in the Olympics.

It has also kept trade barriers in place to prevent foreign companies from competing effectively with Japanese contractors.

Preventing adult siblings from competing with each other doesn't really come into it.