By form a metathesis away from Coptic ⲉⲥⲑⲏⲙ (esthēm), though derivation from an unattested oblique δ (d) form of Ancient Greek στίμμι (stímmi) has been suggested, ultimately from Egyptian sdm, possibly also conflated with Egyptian msdmt.
Oefen met het spreken en memoriseren van " إثمد " en vele andere woorden en zinnen in Arabic .