Which english sound is close to the " eu " in the dutch word " deur " ?
I'm guessing that you mean in UK English. In American English this sound does not exist.
Kind of depends, as "eu" can be pronounced differently. In "deur" it's really close to the "e" in mercy in American English too if the audio is correct, but for the pronunciation in "leuk" there probably isn't an English equivalent, I agree.
So there is no specific sound that I can rely on whenever I encounter the "eu" dutch words? and yes I am referring not only to deur but keuken, leuk among others.
In the Nordic languages there is the "ø" sound which, as far as I know, is the same, but I don't think there is an English example unfortunaly.
However, if you want to practice the pronunciation of it I will refer again to forvo, it has a lot of audio examples for Dutch words. I linked to the words you mentioned and to some other random words:
the "eu" in deur is distinctly different from the one in leuk or keuken (or deuk for that matter). It comes quite close to the Icelandic "au" in laugar, but I don't know any English sound which even comes close to the Dutch "eu" when not followed by an "r".
Why does everyone always forget about French? French phonology is pretty similar to Dutch phonology. The ''eu'' in ''deur'' is almost identical with the ''eu'' in the French word ''beurre''. I call this sound an ''elongated schwa''. So, it's comparable with the ''e'' in ''mercy'', except that the ''eu'' in ''deur'' is a longer sound. You have to draw it out slightly.
You need to move this post to the Dutch forum, so that the people who can answer your question will see it. Don't delete it and create a new one, just click edit and change the topic from Duolingo to Dutch.
I would say the "i" in "birth", and if you're familiar with French it's close to the French "eu" as well.
Unfortunately, I am not familiar with french pronunciation. If I use the "i" in birth, I feel like the sound differs when I pronounce keuken or leuk so you are right cedric _castel , I need to round the lips more while using the "i" in birth or "e" in mercy as Ictram suggested. Thanks!