This is the 8932nd most frequent Catalan word.
existien
"Existien" means "they existed."
In this sentence, 'existien' refers to the past state of existence of trees in the forest, indicating their presence in the past.
Existien molts arbres en aquest bosc abans.
There used to be many trees in this forest before.
Here, 'existien' conveys the presence of problems in a past situation, emphasizing their need for attention.
Existien diversos problemes que necessitaven solució urgent.
There were various problems that required urgent resolution.
In this example, 'existien' is used to discuss the previous presence of various bird species in a certain area.