köken: เพื่อน (pʉ̂ʉan, “friend”) + กิน (gin, “to eat”); literally "friend that eats" or "eating friend", referring to a friend who is only present during meals; probably from or influenced by the 403rd stanza of the 19th century poetic series Khlong Lokkanit ("Law of the World") by Prince Mang (1793–1859), inscribed on the corridor walls of Wat Pho: :: pʉ̂ʉan-gin sîn sáp lɛ́ɛo · nɛ̌ɛng-nǐi :: hǎa ngâai…