abbr. for 柬埔寨[Jian3 pu3 zhai4], Cambodia
Two dots added to 束 (bind; bunch). Based on the original meaning "condense, select", now written as 揀. The current meaning is a phonetic loan.
《說文》：“柬，分別簡之也。从束，从八。八，分別也。”
condense, select