poszerzenie 用英语:

Student exchanges became popular after World War II, and are intended to increase the participants' understanding and tolerance of other cultures, as well as improving their language skills and broadening their social horizon

The government is currently broadening the interpretation of article 9 of the Constitution by wearying it down little by little.

We'd like to widen the range of our goods.

We'd like to widen the rage of our goods.