because
The German word 'weil' is a subordinating conjunction that is used to introduce a dependent clause. It is used to express cause or reason and is typically translated as 'because' in English. For example, 'Ich kann heute nicht kommen, weil ich krank bin.' translates to 'I cannot come today because I am sick.' It is important to note that 'weil' is usually placed at the beginning of the dependent clause, unlike in English where 'because' is usually placed at the end of the clause.
I can't go out because it's raining.
In this example, 'weil' is used to explain the reason for not being able to go out, which is it's raining.
He is sad because his dog died.
Here, 'weil' is used to explain the reason for the subject's sadness, which is the death of his dog.
We have to get up early because we have a flight tomorrow.
In this sentence, 'weil' is used to explain why they have to wake up early, which is because they have a flight the next day.