Where does “សាហេតុ” come from?

សាហេតុ (Khmer) comes from Pali sahetu, from Pali hetu, from Sanskrit हेतु, from Sanskrit तु, from Sanskrit त्वम्, from Proto-Iranian tuHám, from Proto-Indo-Iranian túH, from Proto-Indo-European túh₂ — you, thou.

សាហេតុ (Khmer): reason, cause

Definitions

reason, cause

Ancestry of “សាហេតុ”, step by step

Step	Language	Word	Meaning
1	Pali	sahetu	—
2	Pali	hetu	cause, reason; condition; motive
3	Sanskrit	हेतु	"impulse", motive, cause, cause of, reason for;...
4	Sanskrit	तु	pray, I beg, do; but; and
5	Sanskrit	त्वम्	you, thou
6	Proto-Iranian	tuHám	—
7	Proto-Indo-Iranian	túH	you, thou
8	Proto-Indo-European	túh₂	you, thou

Every word from Proto-Indo-European túh₂ →Every word from Proto-Indo-Iranian túH →Every word from Proto-Iranian tuHám →