Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Khmer ក៏
← Old Khmer ka (inherited)
← Old Khmer *ko (mention)
← Old Khmer *kar (mention)
← Thai ก็ (cognate)

→ Khmer ក៏ប៉ុន្តែ (compound)
→ Khmer ក៏ដោយ (compound)
→ Thai ก็ (cognate)