Where does “sammen” come from?

sammen (Middle English) comes from Old English samnian, from Proto-Germanic *samnōną.

Ancestry of “sammen”, step by step

StepLanguageWordMeaning
1Old Englishsamnianto collect, bring together, gather; to...
2Proto-Germanic*samnōną—

Words derived from “sammen”

Every word from Proto-Germanic *samnōną →Every word from Old English samnian →
sammen — Etymology, Origin & Word History | Etymology Explorer