suppurate

/ˈsʌpjəˌreɪt/
verb
  1. To form or discharge pus (a thick yellowish or greenish fluid) as a result of infection.
    • The doctor warned that the wound might suppurate if not cleaned properly.
    • Without antibiotics, the cut began to suppurate and turn red.
    • The boil continued to suppurate for several days before finally draining.
Synonyms