Declaiming is a term used when someone is speaking in a passionate or forceful manner. It can be used positively, but it can also imply an over-the-top or even aggressive way of speaking. Some antonyms for declaiming could be speaking softly or quietly. It could also be said that someone is speaking calmly or rationally. Instead of being forceful or passionate, they might be described as being measured or moderate in their speech. Other antonyms for declaiming could include being reserved or timid, meaning that the person is hesitant or shy in their manner of speaking. Ultimately, there are many ways to describe someone who is not declaiming, including being gentle, reasoned, and restrained.