Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
pronounce (v.)
when followed by a preposition, usually takes on or upon: She’s always eager to pronounce on [upon] the behavior of other people’s children. It sometimes combines with about: He was constantly pronouncing about the need for more police. With a reflexive pronoun pronounce also combines with for, in favor of, against, and opposed to, as in They pronounced themselves for [in favor of, against, opposed to] the amendment.
