The antonyms for the phrase "beat the drum" could include silence, hush or quiet. These words signify the opposite of making noise or creating a loud commotion. Another antonym could be to speak softly, whisper or murmur, which are all actions that involve expressing oneself in a gentle and subtle manner. To keep still, refrain or abstain are also antonyms for "beat the drum" as these words mean to avoid any visible or audible display of activity. As such, depending on the context, there could be several possible antonyms for the phrase, all of which signify different degrees of silence and restraint.