From Proto-Southwestern Tai *sumᴮ¹ (“trap; fish trap; coop”). Cognate with Northern Thai ᩈᩩ᩵ᨾ, Khün ᩈᩩ᩵ᨾ, ᩈᩪ᩵ᨾ, Lao ສຸ່ມ (sum), Lü ᦉᦳᧄᧈ (ṡum1), Tai Dam ꪎꪴ꪿ꪣ, Shan သုမ်ႇ (sùm), Thai สุ่ม (sùm), Phake ꩬုံ (suṃ), Ahom 𑜏𑜤𑜪 (suṃ).
ᥔᥧᥛᥱ (sǔm) (old orthography ᥔᥧᥛ̌)