The Chinese word 布宜诺斯艾利斯 is formed exclusively through phonetic transliteration, where each character is chosen for its sound to approximate the Spanish name "Buenos Aires": 布 (bù) for "Bu", 宜 (yí) for "e", 诺 (nuò) for "no", 斯 (sī) for "s", 艾 (ài) for "Ai", 利 (lì) for "re", and 斯 (sī) for "s", collectively creating a sound-based representation without semantic relevance from the characters.