This is the 3864th most frequent Portuguese word.
derna
The Portuguese word "derna" refers to the point in time "since" or "from" a certain event, often used in regional contexts to mean "ever since."
In this sentence, 'derna' functions as a synonym for 'desde', indicating a starting point in time for an ongoing situation.
Eu uso este caderno derna que comecei a escola.
I have been using this notebook since I started school.
Here, 'derna' maintains its usage as 'since', associating the explanation as the reason for better comprehension.
Derna que você explicou, agora entendi melhor.
Since you explained, now I understand better.
The word 'derna' in this context replaces 'desde' to specify a point in time when the excitement began.