The phrase "be beaten" implies a sense of defeat or losing a battle. There are many synonyms that can be used to convey the same idea. One of the most common synonyms is "be defeated." Other synonyms include "be overpowered," "be vanquished," "be subdued," or "be overwhelmed." Depending on the context, other synonyms that can be used include "be crushed," "be conquered," "be outmatched," "be overthrown," or "be routed." Each of these words is a powerful expression of the idea of losing a battle, and can be used to add depth and emotion to your writing or conversation.