nothing - nichts
you - du
Nichts du could be an answer to the question Was ist denn los? (What's the matter? What's wrong?). The duwould simply be there for emphasis, beyond that the phrase nichts du doesn't make a lot of sense.
nichts
nothing
It's just gem. Nothing else.
nothing he's dead
Nothing but the day is young = nichts aber der Tag ist jung
fear nothing can be translated as "keine Angst", "mach dir keine Sorgen" or "fürchte dich nicht"
OK, is OK in German too. They tend to write it out as "okay", though.
Be gut means nothing in German. Gut means good, but Be means nothing in German.
Nothing. It is not a German word.
Iger in German means nothing in English. Many words end with -iger in German, but it means nothing by itself.
Selhorst means nothing in German.
Sante means nothing in German.