Etymology
From Middle English amansen, amansien, from Old English āmānsumian (“to excommunicate, anathematize, curse, proscribe, outlaw”, literally “to disjoin”), from a- (“out, without”) + ġemāna (“community, company, common property, communion, companionship, intercourse, cohabitation”) + *sumian. Cognate with Old High German armeinsamōn (“to excommunicate”).