etymo note: ψυχή , روح

the greek ancestor of psyche is ψυχή , ps-u-kh-é (we deliberately maintain the latin grapheme u for the greek υ which otherwise is expressed in latin with grapheme y and phoneme i)

I wonder if sukh is not derived from rukh , they differ in only one letter.

as an aside there is a symbolic - or rather shambolic - linkage: i wonder also whether there is a link between the spirit , pneuma, and the fish . though the general agreement is that the salted fish (fisikh) of Paque -> Pasc and pisces -> Pesakh = فصح in arabic (sham el nesim feast has roots in the christian miracle of the fishes. This is an unecessary line of imagination ,since the goal is to link sukh to ru[h|kh] not link ruh to fsooh. the possible linked is noted however.

it is called to mind because it resembles the weird greek cognate .Sukh of Ru.h

are there are any other instances where psi, ψ , replaces R in cognates. i would have thought it was cognate of the .Sad .