Etymology of νόστιμος: it's from the ancient Greek νόστιμος, which meant homecoming. So Odysseus (Ulysses) was νόστιμος (with the ancient Greek meaning of the word) because he would return to Ithaca. But when you are νόστιμος, you miss your home. And here's why I think this word is beautiful: when you eat something and say it is νόστιμο (in modern Greek), you say that it has the taste of return. The taste reminds you of your home and you miss it, like Odysseus missed so much Ithaca and his family...
First of all I don't speak Romanian, so I don't know what "nostim" means.
The adjective "νόστιμος-η-ο" has two meanings in Greek. It can mean "delicious" (only used for describing food, therefore I would not translate it as "nice" or "funny'', which can be used to describe other things too) or "attractive" (only for a person that you like). Keep in mind that the last meaning is informal.
I hope that this helps. :-)
το κοτοπουλο ειναι νοστιμο the audio is good on the fast speed but lousy on the slow speed so that νοστιμο sounds like a β or a φ not like a ν sound as found in the greek alphabet...google translate helped clear up that mischaracterization of the word. Maybe this interpreter has a special dialect but it is not helpful in trying to hear the audio with a mispronunciation...does anyone hear these audios before they are published?