Where does “treowen” come from?

treowen (Middle English) comes from Old English trēowan, from Proto-Germanic trewwāną, from Proto-Indo-European drew-, from Proto-Indo-European dóru, from Proto-Indo-European deru- — firm, solid; wood; be firm, hard, solid.

Ancestry of “treowen”, step by step

treowen traces back through 3 separate lines of ancestry.

via Old English trēowan

StepLanguageWordMeaning
1Old Englishtrēowan—
2Proto-GermanictrewwānąTo be faithful
3Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree
4Proto-Indo-Europeandórutree
5Proto-Indo-Europeanderu-firm, solid; wood; be firm, hard, solid

via Old English trūwian

StepLanguageWordMeaning
1Old Englishtrūwianto trust, confide
2Proto-West Germanictrūēnto trust
3Proto-Germanictrūjaną—
4Proto-Indo-Europeandrew-o—

via Old English trīewan

StepLanguageWordMeaning
1Old Englishtrīewanto trust
Every word from Proto-Indo-European deru- →Every word from Proto-Indo-European drew- →Every word from Proto-Indo-European dóru →