The Chinese word "卡萨诺瓦" is formed by phonetically transliterating the Italian name "Casanova" using characters that approximate its sounds: 卡 (kǎ) for "Ca", 萨 (sà) for "sa", 诺 (nuò) for "no", and 瓦 (wǎ) for "va", creating a sequence that matches the original pronunciation.