What part of speech is objurgate?

Objurgate can be categorized as a verb.

Parts of speech

1. objurgate is a verb, present, 1st person singular of objurgate (infinitive).
2. objurgate is a verb (infinitive).

Verb
objurgate - censure severely; "She chastised him for his insensitive remarks"
objurgate - express strong disapproval of; "We condemn the racism in South Africa"; "These ideas were reprobated"