The Chinese word "低音" (dīyīn) is a compound term formed by combining two characters: "低" (dī), which means "low" in terms of height or level, and "音" (yīn), which means "sound" or "tone." In this semantic construction, the modifier "低" directly describes the attribute of the noun "音," creating a meaning equivalent to "low-pitched sound" or "bass." This follows a common pattern in Chinese word formation where an adjective is placed before a noun to specify its quality, resulting in a precise and readily understandable term, most frequently used in musical contexts to denote low-frequency sounds or the bass register.