SUPPURATE
fester, maturate, suppurate
(verb) ripen and generate pus; “her wounds are festering”
suppurate, mature
(verb) cause to ripen and discharge pus; “The oil suppurates the pustules”
Source: WordNet® 3.1
Etymology
Verb
suppurate (third-person singular simple present suppurates, present participle suppurating, simple past and past participle suppurated)
(intransitive) To form or discharge pus.
(transitive) To cause to generate pus.
Source: Wiktionary
Sup"pu*rate, v. i. [imp. & p. p. Suppurated; p. pr. & vb. n.
Suppurating.] Etym: [L. suppuratus, p.p. of suppurare to suppurate,
cause to suppurate; sub under + pus, puris, matter. See Pus.]
Definition: To generate pus; as, a boil or abscess suppurates.
Sup"pu*rate, v. t.
Definition: To cause to generate pus; as, to suppurate a sore. Arbuthnot.
Source: Webster’s Unabridged Dictionary 1913 Edition