From Old French empostume, alteration of apostume (“apostume, large abscess”), from Latin apostema, from Ancient Greek ἀπόστεμα (apóstema, “separation of pus into an abscess”).
impostume (plural impostumes)
- (obsolete) An abscess.
, Folio Society, 2006, vol.1, p.220:
- Jason Phereus [was] utterly forsaken of all Physitians, by reason of an impostume he had in his breast […].