Where does “diëtiste” come from?

diëtiste (Dutch) comes from English dietist, from English diët, from Middle English diet, from Old French diete, from Medieval Latin dieta, from Latin diaeta, from Ancient Greek δίαιτα, from Ancient Greek -μᾰ — Creates action nouns or result nouns from verbs.

Ancestry of “diëtiste”, step by step

diëtiste traces back through two separate lines of ancestry.

via English dietist

StepLanguageWordMeaning
1EnglishdietistA person skilled at formulating diets; a...
2EnglishdiëtRare spelling of diet
3Middle Englishdiet
4Old Frenchdietediet
5Medieval Latindietaregimen, regulation; assembly; daily allowance,...
6Latindiaetadiet, regimen; house, dwelling; diet, assembly
7Ancient Greekδίαιταway of living, way of life, mode of life,...
8Ancient Greek-μᾰ"suffix forming a noun denoting the result of an...
9Proto-Indo-European-mn̥Creates action nouns or result nouns from verbs

via Dutch e

StepLanguageWordMeaning
1Dutche
Every word from Proto-Indo-European -mn̥
diëtiste — Etymology, Origin & Word History | Etymology Explorer