Luk venligst døren has the exact same meaning – "be so kind as to close the door" – but uses the imperative form of the verb at lukke ("to close"). For example, ordering a coffee in a cafe by saying "a cup of coffee" – and nothing else – would probably by considered impolite by many, but if you do it in Danish (en kop kaffe) you will generally not be thought of as rude by the barista. Venligst is therefore probably the closest word to "please" that exists in the Danish language.