From Middle Chinese 十 (MC d͡ʑiɪp̚, “ten”). Cognate with Thai สิบ (sìp), Northern Thai ᩈᩥ᩠ᨷ, Lao ສິບ (sip), Lü ᦉᦲᧇ (ṡiib), Tai Dam ꪎꪲꪚ, Shan သိပ်း (síp), Ahom 𑜏𑜢𑜆𑜫 (sip), Zhuang cib, Saek ซิ̄บ.
ᥔᥤᥙᥴ (sip1) (old orthography ᥔᥤᥙˊ)