Dawn or the break of day.

Origin: The word 'อรุณ' (arun) originates from the Sanskrit अरुण (aruṇa), which means 'reddish, dawn' and is associated with the charioteer of the Sun god in Hindu mythology. The word was borrowed into Thai from Sanskrit during the time when Hindu-Buddhist culture had a significant influence on the region.Historical and Cultural Context: In ancient times, the concept of dawn was significant in many cultures, representing new beginnings and hope. The Sanskrit term 'aruṇa' is deeply rooted in Vedic texts and mythologies, symbolizing the arrival of daylight.Evolution: The word remained largely unchanged as it was adopted into the Thai language, retaining both its phonetic and semantic properties. Its cognates in related languages include the Hindi अरुण (aruṇ) and the Bengali অরুণ (oruṇ).Modern Relevance: Today, 'อรุณ' (arun) is a common word used in Thai to denote the dawn or early morning. It is often used in poetry and literature to symbolize the start of a new day or metaphorically to represent hope and renewal.

In Thailand, 'อรุณ' is also a popular given name for boys, symbolizing brightness and new beginnings.