to increase knowledge or skills in a specific area
Wissen oder Fähigkeiten in einem bestimmten Bereich erweitern (Wissen oder Faehigkeiten in einem bestimmten Bereich erweitern)
"He attended workshops to expand his expertise in management."
"Er besuchte Workshops, um seine Expertise in Management auszubauen." (Er besuchte Workshops, um seine **Expertise in** Management auszubauen)
to guide a person toward a helpful choice
to take strong measures to stop corruption
to take precautions to prevent something bad from happening
to gain self-assurance by relying on something
to start working hard on something seriously
to make a group feel more positive