On 15/05/2018 22:46, David Rance wrote:
The rule is that, if "ch" is followed by "s" then it is pronounced "ks"
as in "sechs" (six), "wechseln" (to change). Hence a word which all
travellers in German-speaking countries will be familiar with:
"Geldwechsel"

Fascinating. She's certain her teacher, who was German, pronounced
wachsen and sechs with the guttural CH.

Andy