Due to cold weather, I believe, most Slavic langauges have intonation between consonants... like "invisible" vowels, so to speak. It would be something like m'rka. Even in northern Greece, e becomes i and a becomes o. I think c'rna strela means "black star" in Yugoslav.
i saw a funny thing about languages the other day. i was born and raised in sweden so i can understand 3-4 languages. one i've NEVER been able to grasp however, not for lack of trying, is finnish... even though it technically is a neighboring country. it's such an insanely jam packed language, with so many words for one simple thing... and this is a perfect (and funny) example: