From Proto-Vietic *coːŋ. Cognate with Arem ⁿcʊŋ ("thorn"), Kha Phong coːŋ¹.
The vowel correspondence with Arem, while unusual, is also seen in Vietnamese trốc vs. Arem ulʊk ("head").
chông • (終, 蔠, 柊, 苳, 𱤎)