This is the 13090th most frequent German word.
aktivieren
To activate.
In this sentence, 'aktivieren' is used in a technical context meaning 'to initiate or enable (a system)'.
Um den Computer zu starten, müssen Sie das System aktivieren.
To start the computer, you need to activate the system.
Here, 'aktivieren' is utilized in a physiological sense referring to 'stimulating or engaging (muscles)'.
Das Training hat die Muskeln aktiviert und gestärkt.
The training activated and strengthened the muscles.
In this sentence, 'aktivieren' metaphorically describes stimulating motivation or enthusiasm within a team.