From Proto-Khasian *tʰnləːc, from Proto-Mon-Khmer *nt₁aak. Cognate with Khasi thylliej, thyllieid, Blang [La Gang] ká.ták, Mang taːk⁸, Khmer អណ្ដាត (ʼɑndaat), Semai lentak.
thylleij