IMPOS'THUMATE, verb intransitive impos'tumate. [See Imposthume.] To form an abscess; to gather; to collect pus or purulent matter in any part of an animal body. IMPOS'THUMATE, verb transitive To affect with an imposthume or abscess.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI