This is the 209th most frequent Afrikaans word.
aangesien
"Seeing that" or "since."
Here, 'aangesien' is used as a conjunction to explain the reason for staying indoors.
Aangesien dit reën, moet ons binnenshuis bly.
Since it is raining, we have to stay indoors.
Here, 'aangesien' is used to provide the reason why they decided to watch the movie again.
Aangesien jy daarvan hou, kan ons die film weer kyk.
Since you like it, we can watch the movie again.
In this context, 'aangesien' introduces a cause for the decision to leave early.