Where does “k-cajʔ” come from?

k-cajʔ (Proto-Vietic) comes from Old Chinese 紙.

Ancestry of “k-cajʔ”, step by step

Step	Language	Word	Meaning
1	Old Chinese	紙	—

Words derived from “k-cajʔ”

Every word from Old Chinese 紙 →

k-cajʔ — Etymology, Origin & Word History | Etymology Explorer