Where does “ຫຼາຍ” come from?

ຫຼາຍ (Lao) comes from Proto-Tai ʰlaːjᴬ, from Old Chinese 多.

ຫຼາຍ (Lao): many, much; very, so

Definitions

Step	Language	Word	Meaning
1	Proto-Tai	ʰlaːjᴬ	many; much; many, much
2	Old Chinese	多	—

ຫຼາຍ — Etymology, Origin & Word History | Etymology Explorer