洗脸。

The Chinese word '洗脸' (xǐ liǎn) is composed of two characters: '洗' (xǐ), meaning 'to wash' or 'to clean,' and '脸' (liǎn), meaning 'face.' '洗' (xǐ) is an ancient character, with its origins tracing back to oracle bone script and bronze inscriptions. The character depicts a foot (止) stepping into water (氵), symbolizing the act of washing. Over time, its meaning broadened from washing feet to washing any part of the body or objects. '脸' (liǎn) also has a long history, appearing in early forms in ancient Chinese texts. Its etymology is related to the concept of a 'surface' or 'front part.' In its early usage, it could refer to the front of anything, but it gradually specialized to mean the human face. Therefore, the combination '洗脸' literally means 'wash face.' This compound has been in use for centuries to describe the act of cleaning one's face. The practice of facial washing is a universal human activity, and the term reflects this fundamental daily ritual in Chinese culture. The addition of 'to clean one's face with water and often soap' in the definition further elaborates on the common method and purpose of this action, although 'soap' is a more modern addition to the practice of washing, historically, people would have used various natural cleansers or simply water.