From Proto-Kra, from Proto-Kra-Dai. Cognate with A'ou [Bigong] (ma⁵⁵)nu³¹, Maonan nɔk⁸, Sui nog, Thai นก (nók), Proto-Be *nukᴰ² (whence nok⁸ in the modern lects).
nok¹¹
