`  ==Kosmonaut== Kosmonaut is derived from the russian word kosmos (космос) which means ``space``. The russian word ``kosmos`` is indeed of greek origin, but it's not correct to tell that ``kosmonaut`` was derived from greek.     :That's exactly what the article says; the Russian ``kosmonaut`` is derived from the Greek words ``cosmos`` and ``nautes``. There is no problem.   `