Where does “ombord” come from?

ombord (Norwegian Bokmål) comes from Norwegian Bokmål om, from Old Norse um, from Proto-Germanic umbi, from Proto-Indo-European h₂m̥bʰi, from Proto-Indo-European h₂n̥tbʰi, from Proto-Indo-European h₂énts, from Proto-Indo-European h₂ent-, from Proto-Indo-European h₂en- — on, onto.

Ancestry of “ombord”, step by step

ombord traces back through two separate lines of ancestry.

via Norwegian Bokmål om

StepLanguageWordMeaning
1Norwegian Bokmålomaround; in; about
2Old Norseumabout, concerning; round, past, beyond; over,...
3Proto-Germanicumbiaround, about
4Proto-Indo-Europeanh₂m̥bʰiaround, on either side of, about; in exchange...
5Proto-Indo-Europeanh₂n̥tbʰi
6Proto-Indo-Europeanh₂éntsforehead; front
7Proto-Indo-Europeanh₂ent-face; forehead; front
8Proto-Indo-Europeanh₂en-on, onto

via Norwegian Bokmål bord

StepLanguageWordMeaning
1Norwegian Bokmålbordtable; wooden board; plank; border
2Old Norseborðedge, side of a vessel
3Proto-Germanicburdąboard, plank; table
4Proto-Indo-Europeanbʰers-top, tip, point
Every word from Proto-Indo-European h₂en-Every word from Proto-Indo-European h₂ent-Every word from Proto-Indo-European h₂énts