Where does “assimilering” come from?

assimilering (Dutch) comes from Dutch -ing, from Middle Dutch -inge, from Old Dutch -inga.

Ancestry of “assimilering”, step by step

StepLanguageWordMeaning
1Dutch-ingCreates action nouns referring to the performance...
2Middle Dutch-inge—
3Old Dutch-inga—
Every word from Old Dutch -inga →Every word from Dutch -ing →Every word from Middle Dutch -inge →
assimilering — Etymology, Origin & Word History | Etymology Explorer