This is the 877th most frequent Danish word.
alvorlige
Serious.
Here, 'alvorlig' modifies the noun 'samtale' (conversation), indicating its nature as serious and of importance.
De havde en alvorlig samtale.
They had a serious conversation.
In this sentence, 'alvorlige' is used as an adjective describing 'symptomer' (symptoms), meaning that they are significant or severe.
Han har nogle alvorlige symptomer.
He has some serious symptoms.
This illustrates 'alvorlige' as an adjective describing 'problemerne' (the problems), emphasizing their seriousness requiring urgent intervention.