onderbouwen (Dutch) comes from Dutch onder, from Middle Dutch onder, from Old Dutch under, from Old Saxon undar, from Proto-Germanic under, from Proto-Indo-European h₁entér, from Proto-Indo-European h₁en — in; in, inside.
onderbouwen (Dutch): to support, to buttress; to substantiate
Definitions
to support, to buttress; to substantiate
Ancestry of “onderbouwen”, step by step
onderbouwen traces back through two separate lines of ancestry.