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“ulcerate” in Latin

The English word ulcerate itself goes back to Latin ulcus, through ulcerō.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

ulcerate
Transitively, ulcerare (Cic.): exulcerare (Varr., Cels.).
Intransitively, suppurare (to have pus forming beneath; as transitive, post-Augustan): exulcerari.

Quick answer

What is the Latin word for ulcerate?
The usual Latin words for “ulcerate” are ulcerō, exulcerō, suppūrō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.