Where does “禪那” come from?

禪那 (Chinese) comes from Sanskrit ध्यान, from Sanskrit ध्यै, from Proto-Indo-European dʰeyh₂- — mind, thought.

禪那 (Chinese): dhyana

Definitions

Step	Language	Word	Meaning
1	Sanskrit	ध्यान	meditation, thought, reflection, profound and...
2	Sanskrit	ध्यै	to contemplate, meditate, think of
3	Proto-Indo-European	dʰeyh₂-	mind, thought

禪那 — Etymology, Origin & Word History | Etymology Explorer