Learn Danish: Vinen er lidt sur. - The wine is a bit sour.

Yes! In Danish, sur can describe a person's mood (angry or grumpy) or the taste of food and drink (sour). Since we are talking about vinen (the wine) in this sentence, it translates to sour.

Would sur change if we were talking about a neuter word, like an apple (et æble)?

Yes, it would. Because vin is a common-gender word (en vin), the adjective stays as sur. If you were describing a neuter word like et æble, you would add a 't' to the adjective and say 'æblet er lidt surt'. For plural words, you would add an 'e' (sure).

Why does the sentence use vinen instead of den vin for 'the wine'?

In Danish, you attach the word for 'the' to the end of the noun as a suffix when there is no adjective right in front of it. So en vin becomes vinen. You only use the separate word den if there is an adjective before the noun, like in den røde vin (the red wine).

How is the word lidt pronounced here?

The 'd' in lidt is silent, so it is pronounced very much like the English word 'lit'. It means 'a little' or 'a bit' and is used here to slightly soften the adjective sur.