就让你的名字在我口中生锈
[jiù ràng nĭ de míng zì zài wŏ kŏu zhōng shēng xiù]
The literal meaning of 'let your name rust inside my mouth' is a unique way to express deep attachment over time. This suggests a promise made out of passion, indicating that although love may have faded away or transformed over time, memories remain engraved within oneself; the once frequently spoken name now stays silently stored due to changed circumstances but remains cherished forever.