This is the 947th most frequent German word.
ließen
"Ließen" is the past tense of "lassen," meaning "let" or "allowed."
Here, 'ließen' is the simple past tense of 'lassen' meaning 'to leave something somewhere'.
Die Kinder ließen ihre Spielzeuge im Garten.
The children left their toys in the garden.
In this case, 'ließen' represents the act of allowing or letting someone do something.
Die Eltern ließen die Kinder im Park spielen.
The parents let the children play in the park.
Here, 'ließen' conveys the sense of leaving something in a particular state or condition.