From Proto-Mon-Khmer *ɟruŋ ~ *ɟruŋ ~ *ɟruəŋ ~ *ɟrəŋ (“high, long”). Cognate with Nyaheun ɟruoŋ, Khasi jrong and Riang [Sak] tjᵊrɔːŋ².
ʑaŋ⁴
