In English, it means: it's too hard.
too hard
A hard work is un travail difficile / un dur travail in French.
hard
plus dur
dur / dure is the French adjective for hard.
Dur
dur, dure
The song itself is in the public domain, but certain arrangements, performances, and recordings may have their own protections.
dur, rude, difficile
It depends whether you are speaking informally or formally Informally, you would say: ¡no trabaja demasiado hoy! Formally, you would : ¡no trabaje usted demasiado hoy!
a banana that play the french horn dur
dur (masc.) dure (fem.)