"The process of gradually destroying something, or of wasting away", Early 17th cent. From classical Latin absūmptiōn-, absūmptiō action of using up or spending (2nd or 3rd cent. a.d.), in post-classical Latin also destruction, wasting away from absūmpt-, past participial stem of absūmere + -iō.[absumption etymology, absumption origin, 英语词源]