Where does “ทำความสะอาด” come from?

ทำความสะอาด (Thai) comes from Thai ความสะอาด, from Thai สะอาด, from Khmer ស្អាត, from Proto-Austroasiatic *cʔaʔ.

ทำความสะอาด (Thai): to clean

Definitions

ทำความสะอาด traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Thai	ความสะอาด	cleanness
2	Thai	สะอาด	clean
3	Khmer	ស្អាត	clean; beautiful
4	Proto-Austroasiatic	*cʔaʔ	—

Step	Language	Word	Meaning
1	Thai	ทำ	to make; to do; to perform; to conduct; to carry...
2	Thai	กระทำ	to do; to perform; to carry out