顔を洗う。
Kao o arau.
Wash one's face.
Meaning
To clean the front of one's head with water.
The word '顔' (kao) meaning 'face' is an ancient Japanese word. It is believed to have originated from the Old Japanese word 'かほ' (kaho). The kanji '顔' itself is a semantic-phonetic compound, with '彦' (hiko, a handsome man) as the phonetic component and '頁' (kashira, head) as the semantic component. The verb '洗う' (arau) meaning 'to wash' also has ancient roots in the Japanese language, appearing in classical literature such as the Manyoshu. Its etymology is somewhat debated, but it is generally thought to have developed from a root meaning 'to cleanse' or 'to rinse'. When combined, '顔を洗う' literally means 'to wash the face', and the phrase has been in common use for centuries, reflecting a basic human hygienic practice.
