Where does “onderschrijven” come from?
onderschrijven (Dutch) comes from Dutch schrijven, from Middle Dutch schriven, from Old Dutch scrīvan, from Proto-Germanic skrībaną, from Latin scrībō, from Proto-Italic skreiβō, from Proto-Indo-European skreybʰ- — to write.
onderschrijven (Dutch): to affirm, to support
Ancestry of “onderschrijven”, step by step