Antonyms for "inveighs against" would include words that suggest agreement, support, or praise. Instead of inveighing against something, one might commend it, endorse it, laud it or approve of it. Antonyms could also include words that suggest neutrality, such as ignoring, neglecting, or disregarding the issue altogether. By not inveighing against something, one could be seen as accepting or even endorsing it, but it could also mean that they do not have a strong opinion one way or the other. Ultimately, the antonyms for "inveighs against" depend on the context and the speaker's perspective on the topic at hand.