Passage: In Thai or Lao kamphaeng means 'wall' and phet (from Sanskrit vájra) means 'diamond'. The name means 'wall as hard as diamond'. This wall served as a defensive line to protect the Ayutthaya Kingdom from what is now modern-day Burma. The old name was Khao Kampeng, referring to a 'mountain wall' between the two countries.

Question: How do you say diamond in Thai?
phet