The Chinese word "好坏" (hǎo huài) is formed through the common morphological process of coordinative compounding, where two antonyms, "好" (hǎo, good) and "坏" (huài, bad), are combined to create a single, abstract noun. This specific pairing does not signify a list of separate qualities but instead undergoes semantic fusion to express the holistic concept of "quality", "nature", or "how good or bad something is". It functions grammatically as a nominalized entity that encapsulates a spectrum or assessment, as seen in phrases like "不知道好坏" (bù zhīdào hǎohuài, to not know if it's good or bad / to not know its quality).