From Proto-Tai *dwuːŋᶜ (“belly”). Compare Lao ທ້ອງ (thǭng), Shan တွင်ႉ (tâ̰ung), Thai ท้อง (tɔ́ɔng), Northern Thai ᨴ᩶ᩬᨦ, Zhuang dungx.
ᦑᦸᧂᧉ • (toang²)