This is the 4315th most frequent German word.
erweitern
"Erweitern" means "to expand" or "to extend."
In this sentence, 'erweitern' is used in the sense of increasing or broadening intellectual capacities or knowledge.
Wir müssen unsere Kenntnisse durch weitere Studien erweitern.
We need to expand our knowledge through further studies.
Here, 'erweitern' indicates physically enlarging or expanding infrastructure.
Die Stadt plant, die Autobahn zu erweitern.
The city plans to expand the highway.
In this context, 'erweitern' is used to describe the act of increasing or extending offerings or options.