Jens Elmegaard RASMUSSEN, thanks a lot for your detailed, and very
interesting answer.
It is amazing to see how my ignorance led me to momentarily imagine that
Eng. <anger> and Ger. <Ärger> were related.
Incidentally, _The American heritage dictionary of Indo-European roots_
(1985) gives IE <angh-> "tight, painful" > Germanic <*ang> > Old English
<ang> as the root of Eng. <anger>; no <eng> form is mentioned.

Jean-Paul G. POTET