Here are some possibilities:
* If you mean the opposite in terms of volume, then the opposite of "shouts" would be whispers.
* If you mean the opposite in terms of tone, then the opposite of "shouts" could be whispers, murmurs, or soft words.
* If you mean the opposite in terms of meaning, then the opposite of "shouts" could be pleas, requests, appeals, offers, or suggestions.
It's important to consider the context of the situation to determine the most appropriate opposite for "shouts" in a plural form.