Questions & Answers about Hvis vejret er dårligt, bliver vi hjemme.
Hvis means if. It introduces a condition:
- Hvis vejret er dårligt = If the weather is bad
- bliver vi hjemme = we stay at home
So the whole sentence is a standard if-clause + main clause structure.
Vejr means weather, while vejret means the weather.
In Danish, abstract things like weather are often spoken about with the definite form when you mean the weather in general or the weather in a particular situation:
- vejret = the weather
So Hvis vejret er dårligt is the natural way to say If the weather is bad.