What part of speech is peculate?

Peculate can be categorized as a verb.

Parts of speech

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

Verb
peculate - appropriate (as property entrusted to one's care) fraudulently to one's own use; "The accountant embezzled thousands of dollars while working for the wealthy family"