Seems that my clever little spelling ideas have fallen foul of the English language yet again!
I believed that a double-S in a word (like “hiss“) always requires a soft “ssss“, whereas a single-S is harder – a bit like “szszsz“. But no. That would be too easy.
Take “issue” (I do, quite often – but anyway..). You could say “i-shu” or “iss-yu“. But what about “dissolve” (“dizz-olve“) – that conflicts with my rule, although “dissolution” (“diss-o-lu-shun“) doesn’t.
Disappear ? Soft “ssss” – again, a conflict. Occasion?