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波羅末陀 is the Chinese and Japanese way to write the ancient Sanskrit word Paramārtha or परमार्थ which now means the highest truth, ultimate truth, ultimate reality, or fundamental meaning.
Paramārtha is the name of a famous Buddhist monk born in 499 CE. Paramārtha traveled the world (including Cambodia and territories that are now part of China) to spread the teachings of Buddhism by translating scriptures into the local languages so the truth could be understood by the masses.
So, we should all want to be a Paramārtha who brings the ultimate truth, knowledge, and enlightenment to others.