umbeset
Umbeset (verb) means (archaic) To get in someone's way, or act against their interests.
Etymology
It comes from Middle English umbesetten ("to surround"), from Old English ymbsettan ("to set around, surround, beset, encompass"), from Proto-West Germanic *umbisattjan ("to set around, encompass"), equivalent to um- plus beset, or umbe- plus set. Compare also Old English ymbsittan ("to sit around, surround"), Dutch omzetten ("to convert, transpose"), and German umsetzen ("to move to another place, convert, transform, transplant, adjust, rearrange").