This is the 4561st most frequent German word.
sammeln
"To collect" or "to gather."
In this sentence, 'sammeln' is used to express the action of gathering items of a particular category as a hobby.
Ich sammle alte Münzen.
I collect old coins.
Here, 'sammeln' is metaphorically used to indicate focusing or organizing one's thoughts.
Der Lehrer ermahnt die Schüler, ihre Gedanken zu sammeln.
The teacher urges the students to collect their thoughts.
In this case, 'sammeln' describes the act of physically gathering items from a location.