The Chinese compound word "真谛" is formed through the combination of two distinct characters, each contributing its own semantic meaning to create a nuanced philosophical term. The first character, "真" (zhēn), carries the core meaning of "true," "real," or "genuine." The second character, "谛" (dì), originally from Buddhist translation vocabulary, means "truth," "axiom," or "fundamental principle." When paired, "真" intensifies and qualifies "谛," transforming the compound from a general notion of truth into the concept of the "ultimate truth," "true essence," or "profound and authentic doctrine," often referring to the highest or most fundamental reality in philosophical or religious contexts.