ymb
From Proto-Germanic *umbi, from Proto-Indo-European *h₂m̥bʰi (“around”). Cognate with Old Saxon umbi (Dutch om), Old High German umbi (German um), Old Norse um (Swedish om).
The Indo-European root is also the source of Latin ambi-, Ancient Greek ἀμφί (amphí), Old Irish imb, Sanskrit अभि (abhí, “towards, over, upon”), Old Persian 𐎠𐎲𐎡𐎹 (abiy, “towards, against, upon”).