Translation of "upozorenje" into English

Ovo je upozorenje koje moramo da ozbiljno shvatimo.

This is a warning that we must take seriously.

A što je s plakatima upozorenja ministarstva zdravstva?

What about notices being put up by the health department?

Fascinantno upozorenje, poručniče, jeste da je njih veoma teško ubiti.

The fascinating caveat, lieutenant, is that they are very difficult to kill.

Али моје речи нису у пресуди мојих колега племића, они су упозорење.

But my words are not in judgment of my fellow noblemen, they are a warning.