Where does “terima kasih” come from?

terima kasih (Indonesian) comes from Malay terima kasih, from Malay terima, from Kawi tarima, from Sanskrit तारिम.

Ancestry of “terima kasih”, step by step

Step	Language	Word	Meaning
1	Malay	terima kasih	—
2	Malay	terima	To receive; to receive
3	Kawi	tarima	—
4	Sanskrit	तारिम	—

terima kasih — Etymology, Origin & Word History | Etymology Explorer