This is the 364th most frequent Norwegian word.
alvorlig
Serious.
Here, 'alvorlig' is used as an adjective to describe the seriousness of her illness.
Hun er alvorlig syk.
She is seriously ill.
In this context, 'alvorlig' modifies the noun 'samtale' to indicate the conversation's somber or serious nature.
Det var en alvorlig samtale.
It was a serious conversation.
'Alvorlig' here functions as an adverb, describing how he approached the situation.