Where does “kəlʔ” come from?

kəlʔ (Proto-Vietic) comes from Proto-Mon-Khmer (d)kər — tree; plant; tree, plant.

Ancestry of “kəlʔ”, step by step

Step	Language	Word	Meaning
1	Proto-Mon-Khmer	(d)kər	tree; plant; tree, plant

kəlʔ — Etymology, Origin & Word History | Etymology Explorer