All 4 Uses

reprove
in
Dante's Purgatory -- translated by Norton
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—Reproof of Dante by Beatrice.†
Canto T.O. *

reproof = criticism
[3] Wherefore he to me, "Of his own greatest fault he knows the harm, and therefore it is not to be wondered at if he reprove it, in order that there may be less lamenting on account of it†
Canto 12-22

reprove = criticize
The people who do not come with us offended in that for which once Caesar in his triumph heard 'Queen' cried out against him; therefore they go off shouting 'Sodom,' reproving themselves as thou hast heard, and aid the burning by their shame.†
Canto 23-33

reproving = criticizing or critical
—Reproof of Dante by Beatrice.†
Canto 23-33

reproof = criticism

Definitions:

(1) (reprove)
express disapproval or criticism -- typically in a mild manner & sometimes even in a friendly manner
(2) (meaning too rare to warrant focus)
More rarely (though often from Shakespeare), the form reproof describes punishment rather than merely criticism.